Honda crf 450 rx


Мотоцикл (Кроссовые) CRF450RX — Шасси ( года

На CRF450RX применена диагональная рама CRF седьмого поколения, изготовленная из алюминиевого сплава. Передняя часть обеспечивает полную стабильность и контроль над траекторией, вкупе с отличной обратной связью и предсказуемостью поведения заднего колеса.

Основные диагональные элементы рамы имеют коническое сечение. Их жесткость в поперечном направлении осталась такой же, как и на раме предыдущего поколения, а торсионная жесткость была снижена на 6,8% для улучшения поворачиваемости и обратной связи. Вес рамы равен 9,14 кг. Масса экструдированного заднего подрамника составляет 1045 грамм.

В геометрию рамы, а также в динамические параметры было внесено несколько небольших изменений (относительно предыдущего поколения CRF450R), дающих ощутимое преимущество как кроссменам, так и эндуро райдерам. Центр масс стал ниже на 2,7 мм. Колесная база равна 1482 мм. Расстояние между осью переднего колеса и осью маятника задней подвески составляет 913 мм, а расстояние от оси маятника задней подвески до оси заднего колеса — всего 569 мм. Такая геометрия позволяет сместить больше массы на заднее колесо, что улучшает его сцепление с поверхностью.

Высота по седлу составляет 959 мм. Угол наклона вилки равен 27,4°, вынос переднего колеса — 116 мм. Снаряженная масса равна 118 кг.

CRF450RX это узкий, компактный мотоцикл, которым легко управлять благодаря низкому положению центра масс. Нагрузка на заднее колесо обеспечивает отличный драйв в соочетании с контролем над сцеплением и управляемостью даже при экстремальном вождении.

Мотоцикл оборудован полностью регулируемой 49-милиметровой телескопической вилкой перевернутого типа Showa USD с витыми пружинами. Эта вилка является модификацией заводской гоночной вилки, которую Showa поставляет гонщикам команд MX Race, принимающим участие в чемпионате по мотокроссу. Внутренний диаметр цилиндра вилки равен 25 мм, диаметр штока — 14 мм, а диаметр поршня составляет 39 мм.

Данная подвеска предоставляет все возможности, которые вы ожидаете от гоночных компонентов. Она эластичная, плавная в работе и полностью контролируемая. В отличие от исходной вилки, устанавливаемой на CRF450R, модификация для CRF450RX заправлена меньшим количеством масла и усилие демпфирования сжатия у нее меньше. Это сделано для того, чтобы смягчить реакции вилки для полного соответствия области применения мотоцикла.

Полностью регулируемый амортизатор Showa в задней подвеске установлен строго по оси мотоцикла и смещен вниз для оптимальной централизации масс и повышения стабильности на высокой скорости. Жесткость пружины уменьшена с 54 Н/мм (CRF450R) до 52 Н/мм. Снижено и усилие демпфирования сжатия. Все для того, чтобы повысить эластичность и контролируемость задней подвески. Маятник задней подвески из алюминиевого сплава имеет длину 599 мм (на 18 мм меньше, чем у предыдущего поколения CRF450R), а его плечи стали уже в поперечном сечении.

260-миллиметровый волнообразный передний тормозной диск эффективно рассеивает тепло. 2-поршневой передний тормозной суппорт обладает достаточной мощностью и отличной обратной связью. Сзади установлен 240-милиметровый волнообразный тормозной диск и однопоршневой тормозной суппорт. Легкие обода из алюминиевого сплава со прямым шаблоном креплением спиц вносят вклад в снижение неподрессоренных масс. Спереди установлено колесо размерностью 21×1.6, сзади - 18×2.15. В базовой комплектации мотоцикл оснащается специальными шинами Dunlop Geomax AT81 (90/90-21 спереди и 120/90-18 сзади).

Новое пластиковое «оперение» со сглаженными формами позволяет райдеру свободно перемещаться. Передняя часть мотоцикла стала более узкой — ширина в зоне радиаторов системы охлаждения составляет всего 410 мм. Переднее крыло спроектировано так, чтобы эффективно перенаправлять набегающий поток воздуха к радиаторам.

Кованая боковая подставка из алюминиевого сплава в сложенном состоянии высоко поднята над землей и не мешает езде. Она закреплена на кронштейне из нержавеющей стали в районе левой подножки. На пластиковые наружные панели наклеена прочная пленка со стильным рисунком, защищающая его от царапин.

www.honda.co.ru

Detailed 2017 Honda CRF450RX Review of Specs + Videos & Pictures | Everything you NEED to know about the All-NEW CRF 450!

– Motorcycle Buyer’s Guide | 2017 CRF450RX = Honda’s Fastest Enduro & Woods Race Dirt Bike! –

Alright ladies and gentleman, today we’re going to go over the All-New 2017 Honda CRF450RX and cover its detailed specs from the engine to the frame, suspension etc. There is a LOT to cover so pull up a seat and get comfortable as this will take a few minutes to go over the nitty-gritty details. Don’t have a lot of time and want the “quick version” of this write-up? Scroll down to the bottom of the page and you’ll see a Quick Overview of Features section with a breif overview on everything you need to know about this new dirt bike from Honda!

Honda has an all-new, genuine competition-ready enduro machine in its off-road line up! Alongside the CRF450R, Honda can now also provide enduro riders with a race-ready machine – the new CRF450RX. Sharing the CRF450R’s new engine and frame package (Honda’s first totally all-new 450cc motocross bike in 8 years!), the CRF450RX has crucial changes to create an uncompromising enduro focus.

2017 CRF450RX Photo Gallery / Pictures (bottom of page)

The All-New 2017 CRF450RX takes some features from the CRF450X and CRF450R, puts them together to give you everything you could ever want out of an enduro bike or just to have the baddest true trail bike that isn’t a full-bore motocross / supercross race bike like the R variant of the CRF450. The Honda CRF450R has been a benchmark since its introduction in 2002. It has defined the art of balance, with an engine that produces hard-hitting, useable power and a chassis that allows the rider to put every drop of that power to good use. It has always been a machine that offers total control, together with the stability and durability that Honda has long been famed for. This makes it the perfect platform on which to build an enduro machine, giving the CRF450RX both the pure moto-cross DNA to deal with any special enduro stage and the confidence-inspiring competence to handle flat-out trails, challenging climbs and tight, tricky sections with ease. If you wanted a truly bad and insane off-road motorcycle for the trails in the last decade, you had to buy the CRF450R and have a compromise here and there and or swap parts out to make it more friendly if you weren’t racing it – WFO everywhere! Still don’t need something that is this track and race orientated? Honda is keeping the CRF450X around for 2017 as it is still a very potent package for more than the average woods enthusiast.

2017 CRF450RX Videos

2017 CRF450RX Walk-Around Video | 4K

Among the features that distinguish it from the CRF450R are a smoother ignition map and standard electric start (with kick-start backup), while chassis differences include off-road-focused suspension settings, a revised cylinder-head hanger and changed wheel hubs and axles. The CRF450RX also comes with off-road-appropriate components like a larger plastic fuel tank, forged-aluminum side stand, 18 inch rear rim and Dunlop Geomax AT81 tires, making it the ultimate weapon for events like those in the GNCC series.

The CRF450RX is something truly special, not just for Honda, but for the enduro world to ride and race. It looks different and feels different to the rest of the pack. And, just like the new CRF450R, it is compellingly fast.

Mr M. Uchiyama, Large Project Leader (LPL) 2017 CRF450RX:

“The CRF450RX is a pure, race-ready enduro tool like nothing else Honda has ever made. It uses the greatly improved performance of the brand new CRF450R and we made no sacrifices in producing this ‘RX’ enduro version, which offers something completely new to expert riders everywhere. It is built to win straight from the crate, at the highest level of competition.”

2017 CRF450RX Overview

The 2017 CRF450R has been built from the wheels up based on direct input from AMA and European MX teams, and packs a power to weight ratio 11% better than the outgoing design. The CRF450RX is identical in almost every area, but has some crucial changes to create an uncompromising enduro focus.

Both front and rear suspension are less firm, with lighter compression damping and a lower spring rate for the shock. It uses an enduro-standard 18in rear wheel, and sidestand and 8.5L fuel tank are also added for practicality and extended range.

The CRF450RX’s PGM-FI ignition timing map produces softer power and torque delivery than the CRF450R to aid traction feel in awkward conditions. As on the CRF450R, the EMSB (Engine Mode Select Button) provides the rider with 3 distinct choices: Mode 1 equals all-round smooth performance, Mode 2 gives the most easy-to-manage throttle feel, and Mode 3 delivers the power in the most aggressive, responsive way. Electric start is fitted as standard.

2017 CRF450RX horsepower & torque ratings? At this time, Honda hasn’t released them yet but if you figure the 11% gain from the 2016 CRF450R against the 2017 CRF450R and even back in 16′ the R model made quite a bit of horsepower. It’s going to be interesting to see what the true figures are.

  • 2017 CRF450RX Price: $9,249
  • 2017 CRF450RX Release Date: December 2016

2017 CRF450RX Features

Engine

The CRF450RX’s 449cc engine shares the specification of the new CRF450R engine, which has received an 11% boost in top-end power for 2017, while still offering its trademark progressive, usable power and torque delivery throughout the range. Compression ratio is set at 13.5:1 with bore and stroke of 96mm x 62.1mm.

A four-valve Unicam cylinder head, with a finger rocker arm on the inlet valves, gives inlet valve lift of 10mm; exhaust valve lift is 8.8mm. Inlet valve diameter is 38mm and 2-way valve seat machining smooths gas flow. The downdraught intake provides a direct, straight shot to the inlet ports.

The valve springs are oval in cross section, reducing height to allow for more compact head dimensions. Narrow valve angles of 9° intake and 10.5° exhaust, plus a redesigned flat-topped piston, boost combustion efficiency. A 4-hole piston oil jet reduces piston temperature and deals effectively with the increased temperatures generated by the high compression ratio. Both the piston pin and finger rocker arms have a DLC coating (Diamond-like Carbon), which has excellent abrasive resistance and durability, while also reducing frictional losses

The engine uses a scavenge pump to distribute oil for both transmission and clutch, reducing friction, improving lubrication efficiency and reducing pumping losses. Oil capacity is 1250cc with one sump storing oil for engine, clutch and gearbox.

The compact clutch spins 7 friction disks and the 6 center plates feature a special surface friction material. A 2mm clutch plate dissipates heat efficiently while judder springs generate a good connection feeling on the clutch. All five gear ratios are the same as the CRF450R, but with final drive handled by 13- and 50-tooth sprockets (as opposed to 13/49).

The rider controls and displays are rationalised together and sited on the left handlebar; EFI warning, plus EMSB mode button, LED indicator and engine stop/start button for the standard-fitment electric starter, which makes restarting a stalled engine much easier, especially on tracks with rocky, uneven surfaces.

Honda’s EMSB puts instant engine character adaptability at the rider’s command. With the machine stopped, and engine at idle, a simple press and hold of the button for just under a second selects the next map in sequence.

The LED built into the button signals the map in use with a quick press and number of subsequent flashes (1 flash for Mode 1, etc). If a new map is selected the choice is also confirmed to the rider.

Mode 1 is the base map and provides the most linearity in throttle response, making the engine’s power much more usable in a wide range of conditions. Mode 2 tones down engine performance (especially useful for a tired rider) while Mode 3 delivers the power in the most responsive way – with a delivery similar to the standard mapping (Mode 1) of the CRF450R.

This is a full competition engine and needs regular maintenance. Service intervals are straightforward however with oil/filter changes and valve clearance checks every 15 hours. The engine does not need to be totally stripped and rebuilt after a certain number of hours’ use.

Frame / Chassis

The CRF450RX uses the seventh generation CRF aluminum beam frame with improved turning performance, front-end stability and traction. It also delivers greater rear wheel drive with elevated levels of rider feedback and predictability.

Tapered main spars have 100% of the lateral stiffness of the previous frame, but torsional stiffness is 6.8% less to improve turning ability and feel. The frame weighs 20.2 lbs; the extruded rear subframe 2.3 lbs.

Several subtle changes to the geometry and dynamic parameters have been made compared to the outgoing CRF450R, all of which give considerable benefits to both moto-cross and enduro riders. The center of gravity height is 2.7mm lower. The wheelbase is 1482mm. Distance between the front wheel axle and swingarm pivot is 913mm, with distance from swingarm pivot to rear axle only 569mm. This geometry transfers more weight to the rear wheel for outstanding traction.

Seat height is 37.8 in. Rake and trail are set at 27.4°/116mm. Total wet weight on the 17′ CRF450RX comes in at 261 lbs.

The CRF450RX is a slim, compact machine that’s easy to manage thanks to the low center of gravity. Its rear tyre is loaded hard to dig for drive, matching the front end’s grip level and feel for traction at the limit.

And Honda’s enduro machine is equipped with a fully adjustable 49mm Showa USD coil spring fork – a version of the Showa factory fork supplied to MX race teams in the Japanese national MX championship. The cylinder features a 25mm diameter, with a 14mm rod and 39mm compression piston.

As you would expect from what is effectively race-spec suspension, out of the crate the fork action is supple, smooth and fully in control. Compared directly to CRF450R spec. the CRF450RX fork uses less oil with reduced compression damping, giving a softer reaction feel more suitable for general off-road riding.

The fully adjustable Showa rear shock is mounted low and on the center-line of the machine for optimal mass centralisation and high-speed stability. Its spring rate goes from 54N/mm (CRF450R) to 52N/mm, with compression damping reduced to match. It offers supple, compliant control. At 599mm in length the aluminum swingarm is 18mm shorter than that of the outgoing CRF450R, with thinner shaping (in cross section) for the arms.

A 260mm wave-pattern front disc delivers effective heat dissipation, power and feel from the two-piston brake caliper working it; a matching 240mm wave-pattern disc and single-piston caliper is at the rear. Lightweight aluminum rims, with directly attached spoke pattern layout reduce unsprung weight; the front is 21 x 1.6in, the rear 18 x 2.15in. Fitted as standard equipment are Dunlop’s bespoke enduro Geomax AT81 tyres: 90/90-21 front and 120/90-18 rear.

Fuel range for the 2017 CRF450RX is (approx. 40 miles) thanks to the use of a 2.2 gallon fuel-tank. Thinner, lighter cylinder head hangers compensate for the extra weight of both tank and fuel. New plastics with smooth external lines help the rider move easily around the machine and the machine’s frontal area is narrow; the width of the radiator / tank shrouds is just 410mm while the front mudguard directs an efficient funnel of air to the radiator.

The forged aluminum sidestand tucks high out of the way and attaches to the frame at the left footpeg mount via a stainless steel bracket. Like the CRF450R, the bodywork uses durable film inset graphics that cover a wide area with scratch resistant style.

Don’t want to read through the whole post? Here’s a quick overview of the 2017 CRF 450 RX features and specs you need to know below…

2017 CRF450RXFeatures | Quick Overview

Engineering

Electric and Kick StartTalk about the best of both worlds: The new 2017 CRF450RX comes with both a kick- and electric-starting system as standard equipment. Having both options will ensure faster GNCC starts for the ultimate holeshot.

260mm Front BrakeThe CRF450RX’s large front-brake disc measures a whopping 260mm. You get great brake feel and a wave pattern that cuts down on weight. Front and rear brake-disc guards are part of the package, and are sure to be popular with off-road riders.

Skid PlateA factory skid plate is light and offers the engine and lower-frame protection that a motocross racer demands. The smooth contours help keep you from getting hung up on logs and rocks, too.

KickstandIt seems like a small detail, but off-road bikes can sometimes need a kickstand. Which is exactly why you’ll find this light, compact unit added right from the factory.

Large Fuel TankStopping for fuel in a race costs time. With the CRF450RX’s 2.2-gallon fuel tank, depending on the course and how much roost you’re making everyone else eat, it’s possible to make it through a three-hour enduro with just one fuel stop.

Engine Mode Select ButtonThis simple, handlebar-mounted button lets you dial in engine power delivery character with a push of your thumb. Choose between Standard, Smooth, and Aggressive, depending on course conditions.

Handling

18-Inch Rear WheelAn 18-inch rear wheel is another indication of the CRF450RX’s off-road heritage. Whether it’s red Georgia clay, Florida loam, or Baja sand and rocks, you’re going to find this bike offers the performance you need.

Off-Road Suspension with Spring ForkDesigned specifically for the demands of off-road riding, the CRF450RX’s new Showa Spring Fork and suspension components are fully adjustable and chosen to give you the ultimate tunability and performance in the field for changing conditions.

New Dual-Muffler Exhaust SystemThe CRF450RX’s dual exhaust system is compact and positioned closer and lower in the frame’s center to take weight off the rear end and bring more mass to the bike’s center for superior handling.

Performance

Dunlop Geomax Off-Road TiresThe new Geomax AT81 tires are specially designed for off-road riding, and help the new CRF450RX hook up and put its holeshot traction to the ground.

New Aluminum FrameOur twin spar aluminum frame positions the rear shock’s mounting point low, opening up the airbox area and contributing to a lower center of gravity. The frame geometry also helps give you more traction, and that means more holeshots!

New FlywheelOff-road riders want smooth power delivery that gives the engine’s revving character, better matching it for tougher terrain. That’s why the new CRF450RX gets a special flywheel tuned for off-road use.

Cylinder Head LayoutThe 2017 CRF450RX uses a new “in-finger” rocker design. The efficient Unicam cylinder head gives you the design and performance of a double-overhead-cam layout but the compactness of a single-overhead-cam design.

Scavenge PumpDeep in the engine, there’s a new oil scavenge pump. You may never see it, but it helps keep the CRF450RX’s overall design compact.

2017 CRF450RX Photo Gallery
2017 CRF450RX Specifications
ENGINE
Engine Type 449cc liquid-cooled single-cylinder four-stroke
Bore And Stroke 96mm x 62.1mm
Compression Ratio 13.5:1
Valve Train Unicam® four-valve; 38mm intake, titanium; 31mm exhaust, Steel
Induction Programmed Fuel Injection (PGM-FI), 46mm downdraft throttle body
Ignition Fully transistorized with electronic advance
DRIVE TRAIN
Transmission Close-ratio five-speed
Final Drive #520 Chain; 13T/50T
FRAME / SUSPENSION
Front Suspension 49mm inverted Showa fork with rebound and compression damping adjustability; 12.0 inches of travel
Rear Suspension Pro-Link® Showa single shock with adjustable spring preload, rebound and compression damping adjustability; 12.28 inches of travel
Fuel Capacity 2.2 gallons
Curb Weight 261 lbs (Includes all standard equipment, required fluids and full tank of fuel—ready to ride.)
BRAKES
Front Brake Single 260mm disc with twin-piston caliper
Rear Brake Single 240mm disc
TIRES
Front Tire Dunlop Geomax AT81 90/90-21
Rear Tire Dunlop Geomax AT81 120/90-18
DIMENSIONS
Wheelbase 58.1 inches
Rake 27° 22′ (Caster Angle)
Trail 116mm (4.6 inches)
Seat Height 37.8 inches
Ground Clearance 12.9 inches
OTHER
Colors Red
Model ID CRF450RXH

www.hondaprokevin.com

All-New 2017 Honda CRF450R & CRF450RX Dirt Bikes / Motorcycles Announced!

– New 2017 CRF450R Changes + All-New 2017 CRF450RX Enduro Motorcycle / Dirt Bike –

Well well well… As I mentioned in a previous blog post here, I said we would be releasing a new 2017 motorcycle announcement today (August 11, 2016). It’s been killing me to officially let the cat out of the bag as this model change-up is a BIG deal! The CRF450RX previously known as the CRF450X up until 2016 now shares the same platform as the 17′ CRF450R including engine, frame, suspension etc.

** NEW Pictures & Specs with DETAILED Reviews on both models will be updated shortly covering each of the (2) New 17′ CRF 450 models… **

Honda didn’t just throw new plastics on the CRF 450 model lineup either! As you’ll see by the details below, Honda tore into the CRF450R for 2017 making 2016 CRF450R vs 2017 CRF450R comparisons have quite the list of upgrades.

Ground-up redesign for Honda’s CRF450R moto-crosser; new CRF450RX shares same engine and chassis, bringing a major new presence to the enduro market.

  • HRC-inspired new engine gives CRF450R 11% boost in top end power and stronger torque across the rev range
  • New frame with lower center of gravity and revised geometry provides outstanding rear wheel traction and even more agile handling
  • Electric start available as an option on the 2017 CRF450R
  • New CRF450RX machine has larger tank, 18” rear wheel, sidestand, electric start, revised suspension and engine mapping for uncompromising enduro focus

2017 Honda CRF450RX

Mr M. Uchiyama, Large Project Leader (LPL) of the 2017 CRF450RX:

 “The CRF450RX is a pure, race-ready enduro tool like nothing else Honda has ever made. It uses the greatly improved performance of the brand new CRF450R and we made no sacrifices in producing this ‘RX’ enduro version, which offers something completely new to expert riders everywhere. It is built to win straight from the crate, at the highest level of competition.”

Alongside the CRF450R, Honda can now also provide enduro riders with a race-ready machine – the new CRF450RX. Sharing the CRF450R’s new engine and frame package, the CRF450RX has crucial changes to create an uncompromising enduro focus.

The All-New 2017 CRF450RX takes some features from the CRF450X and CRF450R, puts them together to give you everything you could ever want out of an enduro bike or just to have the baddest true trail bike that isn’t a full-bore motocross / supercross race bike like the R variant of the CRF450. If you wanted a truly bad and insane off-road motorcycle for the trails in the last decade, you had to buy the CRF450R and have a compromise here and there and or swap parts out to make it more friendly if you weren’t racing it – WFO everywhere! Still don’t need something that is this track and race orientated? Honda is keeping the CRF450X around for 2017 as it is still a very potent package for more than the average woods enthusiast.

Among the features that distinguish it from the CRF450R are a smoother ignition map and standard electric start (with kick-start backup), while chassis differences include off-road-focused suspension settings, a revised cylinder-head hanger and changed wheel hubs and axles. The CRF450RX also comes with off-road-appropriate components like a larger plastic fuel tank, forged-aluminum side stand, 18 inch rear rim and Dunlop Geomax AT81 tires, making it the ultimate weapon for events like those in the GNCC series.

2017 CRF450RX horsepower & torque ratings? At this time, Honda hasn’t released them yet but if you figure the 11% gain from the 2016 CRF450R against the 2017 CRF450R and even back in 16′ the R model made quite a bit of horsepower. It’s going to be interesting to see what the true figures are.

  • 2017 CRF450RX Price: $9,249
  • 2017 CRF450RX Release Date: December 2016

2017 CRF450RX Features

Engineering

Electric and Kick StartTalk about the best of both worlds: The new 2017 CRF450RX comes with both a kick- and electric-starting system as standard equipment. Having both options will ensure faster GNCC starts for the ultimate holeshot.

260mm Front BrakeThe CRF450RX’s large front-brake disc measures a whopping 260mm. You get great brake feel and a wave pattern that cuts down on weight. Front and rear brake-disc guards are part of the package, and are sure to be popular with off-road riders.

 

Skid PlateA factory skid plate is light and offers the engine and lower-frame protection that a motocross racer demands. The smooth contours help keep you from getting hung up on logs and rocks, too.

KickstandIt seems like a small detail, but off-road bikes can sometimes need a kickstand. Which is exactly why you’ll find this light, compact unit added right from the factory.

Large Fuel TankStopping for fuel in a race costs time. With the CRF450RX’s 2.2-gallon fuel tank, depending on the course and how much roost you’re making everyone else eat, it’s possible to make it through a three-hour enduro with just one fuel stop.

Engine Mode Select ButtonThis simple, handlebar-mounted button lets you dial in engine power delivery character with a push of your thumb. Choose between Standard, Smooth, and Aggressive, depending on course conditions.

Handling

18-Inch Rear WheelAn 18-inch rear wheel is another indication of the CRF450RX’s off-road heritage. Whether it’s red Georgia clay, Florida loam, or Baja sand and rocks, you’re going to find this bike offers the performance you need.

Off-Road Suspension with Spring ForkDesigned specifically for the demands of off-road riding, the CRF450RX’s new Showa Spring Fork and suspension components are fully adjustable and chosen to give you the ultimate tunability and performance in the field for changing conditions.

New Dual-Muffler Exhaust SystemThe CRF450RX’s dual exhaust system is compact and positioned closer and lower in the frame’s center to take weight off the rear end and bring more mass to the bike’s center for superior handling.

Performance

Dunlop Geomax Off-Road TiresThe new Geomax AT81 tires are specially designed for off-road riding, and help the new CRF450RX hook up and put its holeshot traction to the ground.

New Aluminum FrameOur twin spar aluminum frame positions the rear shock’s mounting point low, opening up the airbox area and contributing to a lower center of gravity. The frame geometry also helps give you more traction, and that means more holeshots!

New FlywheelOff-road riders want smooth power delivery that gives the engine’s revving character, better matching it for tougher terrain. That’s why the new CRF450RX gets a special flywheel tuned for off-road use.

Cylinder Head LayoutThe 2017 CRF450RX uses a new “in-finger” rocker design. The efficient Unicam cylinder head gives you the design and performance of a double-overhead-cam layout but the compactness of a single-overhead-cam design.

Scavenge PumpDeep in the engine, there’s a new oil scavenge pump. You may never see it, but it helps keep the CRF450RX’s overall design compact.

2017 CRF450RX Photo Gallery

2017 Honda CRF450R

Everything about the new-from-the-ground-up 2017 CRF450R is designed for the absolute holeshot. A new Unicam engine offers increased horsepower to the tune of an 11% increase as well as added torque across the rev range, thanks in part to an ultra-direct downdraft air intake, steeper valve angle and twin exhaust system with smoother routing. The chassis boasts new geometry and packaging that results in a more concentrated, lower center of mass, helping to get the power to the ground, maximize stability and improve cornering performance. The lighter aluminum frame has a narrower cross-section and a lighter, extruded aluminum rear subframe. The motorcycle is equipped with a coil-spring 49mm Showa fork, while the rear suspension comprises a lighter swingarm assembly and a shock with a lower mounting position. Dunlop Geomax MX3S tires come standard, and the CRF450R is the first mass-produced motocross bike ever to come with a titanium fuel tank.

Want to make life easy for you on your 2017 CRF450R? How does electric start sound? It is now an option for the first time ever on Honda’s CRF-R models including the CRF150R, CRF250R and of course the CRF450R.

  • 2017 CRF450R Price: $8,849
    • 2017 CRF450R vs 2016 CRF450R Price Increase of $150
  • 2017 CRF450R Release Date: October 2016

2017 CRF450R Features

CRF450R Performance

Downdraft Fuel InjectionPart of an entire engine overhaul for 2017, the new downdraft intake tract and FI body help and increase both power and fuel-metering precision. It’s part of the reason the CRF450R offers such explosive power and massive torque, especially out of the starting gate and in the critical first 100 feet of the race to the first turn.

Dunlop MX3S TiresDeveloped using Dunlop’s latest “block-on-block” design technology, the CRF450R’s new MX3S tires give excellent feedback and are a perfect complement to the CRF450R’s new frame and suspension.

New Cylinder Head LayoutThis year the new 2017 CRF450R uses a new “in-finger” rocker design. The Unicam cylinder head remains the most efficient in the MX world, giving you the design and performance of a double-overhead-cam layout but the compactness of a single-overhead-cam design.

Higher, 13.5:1 Compression RatioA new combustion-chamber design with a revising squish area helps boost the CRF450R’s compression to new heights this year, an impressive 13.5:1. That means improved combustion efficiency for more power.

New “In Molded” GraphicsWith the all the time you’ll be spending in victory circle, you need to look your best. The new CRF450R has you covered. New “in molded” graphics look great, and stay looking good longer.

Skid PlateA factory skid plate is light and offers the engine and lower-frame protection that a racer demands.

CRF450R Handling

New Showa® Spring ForkAn all-new 49mm Showa® fork features a conventional spring design that helps increase the CRF450R’s front-suspension precision, handling and feel.

Next-Generation Aluminum FrameNew for 2017, our Next-Gen twin spar aluminum frame positions the new rear shock’s mounting point lower, opening up the airbox area and contributing to a lower center of gravity for more holeshots. The frame geometry also helps improve traction, feeling and steering precision.

 

Updated Twin-Muffler Exhaust SystemThe CRF450R’s dual exhaust system is even more compact for 2017 and positioned closer and lower in the frame’s center to take weight off the rear end and bring more mass to the bike’s center for improved handling. It also allows for more air flow, and that equals added horsepower.

CRF450R Engineering

Electric-Start OptionLooking for an awesome new option? Check out the electric-start kit available for the first time on the new CRF450R!

260mm Front BrakeThe CRF450R’s large front-brake disc measures a whopping 260mm. You get great brake feel and a wave pattern that cuts down on weight. Front and rear brake-disc guards are part of the package too.

Titanium Fuel TankGrams and performance count, and the 2017 CRF450R makes a big switch to a titanium fuel tank this year. Light and strong, it’s also thinner than our previous plastic unit, while maintaining the same capacity, freeing up more space and helping to centralize fuel mass.

Engine Mode Select ButtonThis new simple handlebar-mounted button lets you dial in engine power delivery character with a push of your thumb. Choose between Standard, Smooth and Aggressive, depending on track conditions.

New Scavenge PumpDeep in the engine, there’s a new oil scavenge pump. You may never see it, but it helps keep the CRF450R’s overall design.

CRF450R Comfort

Flatter Seat/Tank JunctionThe new 2017 CRF450R features a new, flatter seat/tank junction, including a new titanium fuel tank. The improved ergonomics make it easier to move forward and back on the bike, increasing your control.

2017 CRF450R Photo Gallery
2017 CRF450R Specifications
ENGINE
Engine Type 449cc liquid-cooled single-cylinder four-stroke
Bore And Stroke 96mm x 62.1mm
Compression Ratio 13.5:1
Valve Train Unicam® four-valve; 38mm intake, titanium; 31mm exhaust, Steel
Induction Programmed Fuel Injection (PGM-FI), 46mm downdraft throttle body
Ignition Fully transistorized with electronic advance
DRIVE TRAIN
Transmission Close-ratio five-speed
Final Drive #520 Chain; 13T/49T
FRAME / SUSPENSION
Front Suspension 49mm inverted Showa fork with rebound and compression damping adjustability; 12.0 inches of travel
Rear Suspension Pro-Link® Showa single shock with adjustable spring preload, rebound and compression damping adjustability; 12.3 inches of travel
Fuel Capacity 1.6 gallons
Curb Weight 243 lbs (Includes all standard equipment, required fluids and full tank of fuel—ready to ride.)
BRAKES
Front Brake Single 260mm disc with twin-piston caliper
Rear Brake Single 240mm disc
TIRES
Front Tire Dunlop MX3S 90/100-21
Rear Tire Dunlop MX3S 120/80-19
DIMENSIONS
Wheelbase 58.3 inches
Rake 27° 22′ (Caster Angle)
Trail 116mm (4.6 inches)
Seat Height 37.8 inches
Ground Clearance 12.9 inches
OTHER
Colors Red
Model ID CRF450RH

 

2017 CRF450RX Specifications
ENGINE
Engine Type 449cc liquid-cooled single-cylinder four-stroke
Bore And Stroke 96mm x 62.1mm
Compression Ratio 13.5:1
Valve Train Unicam® four-valve; 38mm intake, titanium; 31mm exhaust, Steel
Induction Programmed Fuel Injection (PGM-FI), 46mm downdraft throttle body
Ignition Fully transistorized with electronic advance
DRIVE TRAIN
Transmission Close-ratio five-speed
Final Drive #520 Chain; 13T/50T
FRAME / SUSPENSION
Front Suspension 49mm inverted Showa fork with rebound and compression damping adjustability; 12.0 inches of travel
Rear Suspension Pro-Link® Showa single shock with adjustable spring preload, rebound and compression damping adjustability; 12.28 inches of travel
Fuel Capacity 2.2 gallons
Curb Weight 261 lbs (Includes all standard equipment, required fluids and full tank of fuel—ready to ride.)
BRAKES
Front Brake Single 260mm disc with twin-piston caliper
Rear Brake Single 240mm disc
TIRES
Front Tire Dunlop Geomax AT81 90/90-21
Rear Tire Dunlop Geomax AT81 120/90-18
DIMENSIONS
Wheelbase 58.1 inches
Rake 27° 22′ (Caster Angle)
Trail 116mm (4.6 inches)
Seat Height 37.8 inches
Ground Clearance 12.9 inches
OTHER
Colors Red
Model ID CRF450RXH

www.hondaprokevin.com

2017 Honda CRF450RX Review | First Impression

Since Honda announced its off-road lineup back in early August we have been anxiously awaiting to get our hands on the all-new 2017 CRF450RX, which is based off of the CRF450R model. For 2017 Honda decided to enter the “in between” market, which is basically a motocross based model that has specific “off-road” parts designed to make it more capable out in the wild. We met Honda and the all of their technicians out at Cahuilla Creek in Anza, California where they set up a hybrid four-mile off-road/ motocross loop for us to give it a test.

The 2017 Honda CRF450RX has all the same brand new engine parts the “R” has like a new downdraft intake layout to improve air charging efficiency, a new combustion chamber with a higher compression piston, decreased valve angle, use of a finger rocker arm to get increased valve lift, updated coils on valve springs have oval cross-sections to try and achieve a lower engine temperature, a new port layout with straighter airflow for increased efficiency, DLC on piston pin and rocker arm to combat friction, a more compact dual muffler design with more gradual pipe bends for a smoother exhaust flow, a shallower clutch assembly with fewer and thicker plates for narrower engine width. But the what makes the CRF450RX standout as a more hybrid off-road model is the electric start, revised ignition mapping (for a smoother power delivery than the “R” model) an 18 inch rear wheel, revised fork and shock settings (increased preload, lower oil level, decreased rebound damping, lighter rear spring) a 2.25 gallon fuel capacity, plastic skid plate, revised upper engine mounts (for rigidity balance) and Dunlop Geomax AT 81 tires.

Engine:

After spending a lot of time on the 2017 Honda CRF450R recently we didn’t notice a huge change in engine performance. The 2017 Honda CRF450RX has incredible throttle response that had couple testers feeling like it was almost better than the “R” model (on the CRF450RX’s standard map). An aggressive torquey low end kept the rear wheel from spinning too much in the drier sections of the trails, but gave you that exciting feeling all way around the tight and flowy course. The mid range pull is great in second and third gear switchbacked trails. Transitioning into the top end the CRF450RX pulls incredibly far considering it incorporates a 13/50 gearing ratio unlike the 13/49 gearing ratio the “R” comes with. We would love to see this gearing set up come stock on the “R” model as well, as having that extra tooth on the CRF450RX let us use third gear more in tighter sections of the trail. The engine would stay in the meat of the power (without much fanning of the clutch) adequately in third gear and does not force the rider to downshift to second (like the “R” can). Over-rev is not quite as good as the “R” but we never needed it to on this day either. The beauty of the CRF450RX’s engine character is its ease of riding ability. It pleased our Novice tester as well as my faster more aggressive riding style.

Suspension:

We were worried that the Showa 49mm front fork would feel too mushy as Honda told us in a our morning meeting, “that the suspension settings were softer than the “R” model”. The front fork moves in the stroke freely and still has great damping feeling through the mid stroke. The end stroke is soft, but doesn’t ever bottom violently. The intial part of the stroke is somewhat stiff feeling as it can make for some deflection on faster choppy roads. We softened the compression up only two clicks and this helped tremendously. Doing this didn’t affect much of any of the bottoming resistance the fork had. Each fork click on this fork makes a difference, so when you make changes you will want to make a change one click at a time. We also slowed the rebound damping one click to help the front end hold up a little more when coming hard into corners on the moto portion of the track. The Honda CRF450RX keeps great front wheel traction and comfort as the course turned a little ugly in slower sections. The rear of the bike feels similar to the front as it has somewhat soft initially but squatting out of choppy, slower section of the trail the rear wheel stayed in contact with the ground and gave forward bit/rear wheel traction. The shock is a little soft on the end stroke on harder hits so we stiffened the low speed compression two clicks and this helped from bottoming on g-outs. Both ends of the machine interact well and feel balanced when out on the trail. Some portion of the trails we rode were very choppy and slow speed and you could really feel the comfort of both ends of the suspension. We are happy with Honda’s choice in going with a spring fork and glad they continue to listen to the consumer on what the demand is.

Chassis:

The straight-line stability of the CRF450RX is predictable and will not do anything that is out of the ordinary. As speeds crept up on faster portions of the course the Honda reacted well and gave each tester confidence and comfort. We found out we liked our sag settings a little lower than the “R” model at around 106-108 however, as this made de-cel pitching less noticeable when transitioning from a fast section to a tight corner. Less pitch was felt (front to back) and this didn’t affect the Honda’s excellent cornering ability. Yes, that is right the CRF450RX corners almost as good as the “R” and feels super light in tight sections of the trail. At a curb weight of 261 pounds you can still flick it around in corners similar to its moto brother. Where you feel the weight mostly is through mid-corner, where you are trying to keep it leaning into a rut. In sand where berms are more predominant, the Honda gives you a superb leaning feeling and can float all the way around without much fuss (or heavy oversteer). Yes, the CRF450RX feels bulkier (than the “R”) in the shroud/tank area near the rider’s knees when sitting, but is not noticeable when cornering the machine.

We came awasy with the feeling that the 2017 Honda CRF450RX is a very fun, fast, well-mannered hybrid machine that is capable of taking you to the moto track and the trails all in one day. How will it stack up against other bikes in its genre is what everyone will be asking next right? Stay tuned in the upcoming weeks as the Dirt Rider Off-Road Shootout will be taking place very shortly and you will be able to see how the CRF450RX stacks up against the other colored hybrids soon.

www.dirtrider.com

2017 HONDA CRF450RX

Model updates: Honda now has a race-ready enduro machine: the CRF450RX is based on the all-new 17YM CRF450R and features enduro-spec suspension, PGM-FI and EMSB mapping plus larger fuel tank, 18in rear wheel, sidestand and electric start as standard.

Contents:

1 Introduction

2 Model overview

3 Key features

4 Technical specifications

 

1. Introduction 

Honda has an all-new, genuine competition-ready enduro machine in its off-road line up – the CRF450RX. And it takes as its rock-solid base the engine and chassis package of the 17YM CRF450R – Honda’s first totally new 450cc moto-crosser in eight years.

The Honda CRF450R has been a benchmark since its introduction in 2002. It has defined the art of balance, with an engine that produces hard-hitting, useable power and a chassis that allows the rider to put every drop of that power to good use. It has always been a machine that offers total control, together with the stability and durability that Honda has long been famed for.

This makes it the perfect platform on which to build an enduro machine, giving the CRF450RX both the pure moto-cross DNA to deal with any special enduro stage and the confidence-inspiring competence to handle flat-out trails, challenging climbs and tight, tricky sections with ease.

The CRF450RX is something truly special, not just for Honda, but for the enduro world to ride and race. It looks different and feels different to the rest of the pack. And, just like the new CRF450R, it is compellingly fast.

 

Mr M. Uchiyama, Large Project Leader (LPL) 17YM CRF450RX: 

“The CRF450RX is a pure, race-ready enduro tool like nothing else Honda has ever made. It uses the greatly improved performance of the brand new CRF450R and we made no sacrifices in producing this ‘RX’ enduro version, which offers something completely new to expert riders everywhere. It is built to win straight from the crate, at the highest level of competition.”

 

2. Model Overview

The 17YM CRF450R has been built from the wheels up based on direct input from AMA and European MX teams, and packs a power to weight ratio 11% better than the outgoing design. The CRF450RX is identical in almost every area, but has some crucial changes to create an uncompromising enduro focus.

Both front and rear suspension are less firm, with lighter compression damping and a lower spring rate for the shock. It uses an enduro-standard 18in rear wheel, and sidestand and 8.5L fuel tank are also added for practicality and extended range.

The CRF450RX’s PGM-FI ignition timing map produces softer power and torque delivery than the CRF450R to aid traction feel in awkward conditions. As on the CRF450R, the EMSB (Engine Mode Select Button) provides the rider with 3 distinct choices: Mode 1 equals all-round smooth performance, Mode 2 gives the most easy-to-manage throttle feel, and Mode 3 delivers the power in the most aggressive, responsive way. Electric start is fitted as standard.

 

3. Key Features

3.1 Engine

The CRF450RX’s 449cc engine shares the specification of the new CRF450R engine, which has received an 11% boost in top-end power for 2017, while still offering its trademark progressive, usable power and torque delivery throughout the range. Compression ratio is set at 13.5:1 with bore and stroke of 96mm x 62.1mm.

 

A four-valve Unicam cylinder head, with a finger rocker arm on the inlet valves, gives inlet valve lift of 10mm; exhaust valve lift is 8.8mm. Inlet valve diameter is 38mm and 2-way valve seat machining smooths gas flow. The downdraught intake provides a direct, straight shot to the inlet ports.

 

The valve springs are oval in cross section, reducing height to allow for more compact head dimensions. Narrow valve angles of 9° intake and 10.5° exhaust, plus a redesigned flat-topped piston, boost combustion efficiency. A 4-hole piston oil jet reduces piston temperature and deals effectively with the increased temperatures generated by the high compression ratio. Both the piston pin and finger rocker arms have a DLC coating (Diamond-like Carbon), which has excellent abrasive resistance and durability, while also reducing frictional losses

The engine uses a scavenge pump to distribute oil for both transmission and clutch, reducing friction, improving lubrication efficiency and reducing pumping losses. Oil capacity is 1250cc with one sump storing oil for engine, clutch and gearbox.

The compact clutch spins 7 friction disks and the 6 centre plates feature a special surface friction material. A 2mm clutch plate dissipates heat efficiently while judder springs generate a good connection feeling on the clutch. All five gear ratios are the same as the CRF450R, but with final drive handled by 13- and 50-tooth sprockets (as opposed to 13/49).

The rider controls and displays are rationalised together and sited on the left handlebar; EFI warning, plus EMSB mode button, LED indicator and engine stop/start button for the standard-fitment electric starter, which makes restarting a stalled engine much easier, especially on tracks with rocky, uneven surfaces.

Honda’s EMSB puts instant engine character adaptability at the rider’s command. With the machine stopped, and engine at idle, a simple press and hold of the button for just under a second selects the next map in sequence.

The LED built into the button signals the map in use with a quick press and number of subsequent flashes (1 flash for Mode 1, etc). If a new map is selected the choice is also confirmed to the rider.

Mode 1 is the base map and provides the most linearity in throttle response, making the engine’s power much more usable in a wide range of conditions. Mode 2 tones down engine performance (especially useful for a tired rider) while Mode 3 delivers the power in the most responsive way – with a delivery similar to the standard mapping (Mode 1) of the CRF450R.

This is a full competition engine and needs regular maintenance. Service intervals are straightforward however with oil/filter changes and valve clearance checks every 15 hours. The engine does not need to be totally stripped and rebuilt after a certain number of hours’ use.

 

3.2 Chassis

The CRF450RX uses the seventh generation CRF aluminium beam frame with improved turning performance, front-end stability and traction. It also delivers greater rear wheel drive with elevated levels of rider feedback and predictability.

Tapered main spars have 100% of the lateral stiffness of the previous frame, but torsional stiffness is 6.8% less to improve turning ability and feel. The frame weighs 9.14kg; the extruded rear subframe 1,045g.

 

Several subtle changes to the geometry and dynamic parameters have been made compared to the outgoing CRF450R, all of which give considerable benefits to both moto-cross and enduro riders. The centre of gravity height is 2.7mm lower. The wheelbase is 1482mm. Distance between the front wheel axle and swingarm pivot is 913mm, with distance from swingarm pivot to rear axle only 569mm. This geometry transfers more weight to the rear wheel for outstanding traction.

Seat height is 959mm. Rake and trail are set at 27.4°/116mm. Total wet weight is 118kg.

The CRF450RX is a slim, compact machine that’s easy to manage thanks to the low centre of gravity. Its rear tyre is loaded hard to dig for drive, matching the front end’s grip level and feel for traction at the limit.

And Honda’s enduro machine is equipped with a fully adjustable 49mm Showa USD coil spring fork – a version of the Showa factory fork supplied to MX race teams in the Japanese national MX championship. The cylinder features a 25mm diameter, with a 14mm rod and 39mm compression piston.

As you would expect from what is effectively race-spec suspension, out of the crate the fork action is supple, smooth and fully in control. Compared directly to CRF450R spec. the CRF450RX fork uses less oil with reduced compression damping, giving a softer reaction feel more suitable for general off-road riding.

The fully adjustable Showa rear shock is mounted low and on the centre-line of the machine for optimal mass centralisation and high-speed stability. Its spring rate goes from 54N/mm (CRF450R) to 52N/mm, with compression damping reduced to match. It offers supple, compliant control. At 599mm in length the aluminium swingarm is 18mm shorter than that of the outgoing CRF450R, with thinner shaping (in cross section) for the arms.

A 260mm wave-pattern front disc delivers effective heat dissipation, power and feel from the two-piston brake caliper working it; a matching 240mm wave-pattern disc and single-piston caliper is at the rear. Lightweight aluminium rims, with directly attached spoke pattern layout reduce unsprung weight; the front is 21 x 1.6in, the rear 18 x 2.15in. Fitted as standard equipment are Dunlop’s bespoke enduro Geomax AT81 tyres: 90/90-21 front and 120/90-18 rear.

Fuel range is (approx. 65km) thanks to the use of an 8.5L plastic fuel tank. Thinner, lighter cylinder head hangers compensate for the extra weight of both tank and fuel. New plastics with smooth external lines help the rider move easily around the machine and the machine’s frontal area is narrow; the width of the radiator/tank shrouds is just 410mm while the front mudguard directs an efficient funnel of air to the radiator.

The forged aluminium sidestand tucks high out of the way and attaches to the frame at the left footpeg mount via a stainless steel bracket. Like the CRF450R, the bodywork uses durable film inset graphics that cover a wide area with scratch resistant style.

 

4. Technical Specifications

ENGINE

 

Type

Liquid-cooled 4-stroke single cylinder uni-cam

Displacement

449.7cc

Bore ´ Stroke

96.0mm x 62.1mm

Compression Ratio

13.5:1

FUEL SYSTEM

 

Carburation

Fuel injection

Fuel Tank Capacity

8.5 litres

ELECTRICAL SYSTEM

 

Ignition

Full transistor

Starter

Electric

DRIVETRAIN

 

Clutch Type

Wet multiplate

Transmission Type

Constant mesh

Final Drive

Chain

FRAME

 

Type

Aluminium twin tube

CHASSIS

 

Dimensions (L´W´H)

2,175mm x 827mm x 1,274mm

Wheelbase

1,477mm

Caster Angle

27° 26'

Trail

116mm

Seat Height

959mm

Ground Clearance

328mm

Kerb Weight

118kg

SUSPENSION

 

Type Front

Showa 49mm coil spring fork (305mm stroke)

Type Rear

Showa monoshock using Honda Pro-Link system (133 stroke, 3125mm axle travel)

WHEELS

 

Type Front

Aluminium spoke

Type Rear

Aluminium spoke

Tyres Front

90/90-21 Dunlop GeoMax AT81

Tyres Rear

120/90-18 Dunlop GeoMax AT81

BRAKES

 

Front

260mm hydraulic wave disc

Rear

240mm hydraulic wave disc

All specifications are provisional and subject to change without notice.

hondanews.eu


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