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All new 2018 Honda CRF250R breaks cover

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All new 2018 Honda CRF250R breaks cover
Honda‰Ûªs next generation CRF250R is on its way with a December arrival and plenty of exciting upgrades - the wait for this all-new race beast is worth it!

The 2018 CRF250R has more engine power, upgraded stability and traction as well as a re-designed dual exhaust and titanium intake system to help get you that holeshot.

Notable changes found in the CRF250R; a new compact DOHC engine with rocker arms, higher valve lift, larger valve diameter and a higher rev limit resulting in a +5% power-to-weight and peak power at 2000rpm higher.

A new straight intake layout and dual exhaust system further enhance the power and speed range of the entire engine. Adapting an advanced Scavenge Pump system reduces engine friction and ‰Û÷pumping‰Ûª losses at high rpm which results in upgraded engine efficiency.
All new 2018 Honda CRF250R breaks cover
All new 2018 Honda CRF250R breaks cover
The CRF250Rs redesigned chassis gives the rider absolute control of this new powered-up DOHC engine.

Changes to geometry and dynamic parameters of the frame‰Ûªs performance give the CRF250R enhanced starting performance, front-end stability and rear wheel traction.

The shorter wheel base on this 18YM distributes riders weight onto the rear wheel for far better rear wheel grip.

Weight reduction from a new titanium tank, lower engine mount and lower rear shock mounts give the CRF250R a lower centre of gravity and greatly improve overall stability and offer anti-front end lift.

Front suspension is now steel-sprung 49mm Showa USD front forks and smooth surface plastics make the CRF250R look more like its bigger motocross brother ‰ÛÒ the CRF450R.
All new 2018 Honda CRF250R breaks cover
All new 2018 Honda CRF250R breaks cover
For 2018, the CRF250R is also equipped with a compact, lightweight lithium-ion battery. Electric Start is now standard for superior start / restart and recovery especially in cold conditions where the lithium battery can sustain temperatures of -10 degrees Celsius. Kick start has been removed.

The three engine modes; as with the 2017 model are available on the 2018 CRF250R to maintain its versatility whereby riders can select from 3 different Engine Modes to accommodate different riding conditions and riding skills: Mode 1: Standard, Mode 2: Smooth and Mode 3: Aggressive.

Leaked images of this new machine circulated back in May where the 18YM CRF250R made its race debut at the Japan MX Championship in Hiroshima; ridden to victory by four-time 250cc class Champion in Japan, Takeshi Katsuya.

This redesign will ensure the CRF250R achieves outstanding hole shot start acceleration and provide racers with exactly what they need and makes it Honda‰Ûªs most competitive, durable and formidable 250cc race machine to date.
All new 2018 Honda CRF250R breaks cover
All new 2018 Honda CRF250R breaks cover
KEY UPDATES

  • More over-square bore/stroke dimensions

  • Increased valve size/lift, narrower valve angle, oval cross-section valve springs

  • Higher compression ratio

  • Downdraft air intake

  • Dual exhaust ports/headers/exhausts

  • Electric start

  • Lighter frame/subframe with optimized flexibility characteristics

  • Revised chassis geometry for lighter handling, improved rear traction, reduced front-end lift

  • Coil-spring fork

  • Titanium fuel tank

All new 2018 Honda CRF250R breaks cover
All new 2018 Honda CRF250R breaks cover
ENGINE

In order to achieve their powerplant development goal of increased power (particularly at higher revs), engineers gave the 249cc engine an all-new dual-overhead-cam design, using a finger rocker arm with Diamond Like Coating (DLC). The titanium intake and exhaust valves are larger and have a higher lift and narrower angle, while the valve springs‰Ûª coils now have an oval cross-section to keep engine height as low as possible.

The engine has more oversquare dimensions, the cylinder offset has been increased, and the piston now features a bridge-box design‰ÛÒa first for a production Honda motocrosser. The intake system is now of a downdraft design for maximum efficiency, there are twin exhaust ports, and the dual exhaust features smoother routing and optimized pipe length. An electric starter is standard, powered by a small, lightweight lithium-iron phosphate battery. The end result of the copious changes is an engine with more power across the rev range, especially impressive at peak rpm.High-performance, 249cc single-cylinder engine with dual-overhead-cam design and higher rev limit.
All new 2018 Honda CRF250R breaks cover
All new 2018 Honda CRF250R breaks cover
  • Cylinder offset changed from 4mm to 4.5mm for reduced friction.

  • Finger rocker arm with Diamond Like Coating (DLC) maximizes valve lift while retaining a low engine height.

  • Optimized bore and stroke, larger valves, and a narrower valve angle contribute to increased power and a higher redline.

  • Oval-section coils on valve springs allow for increased valve lift while retaining a low engine height.

  • Bridge-box piston converts combustion pressure to power with higher efficiency.

  • Larger piston jet oil hole for weight reduction and reduced friction.

  • New scavenging pump reduces pumping loss.

  • Crankshaft with H-shape cross section enables weight reduction without sacrificing rigidity or inertial mass.

  • Downdraft intake layout increases power and improves throttle response by reducing resistance, improving air-charging efficiency.

  • Shorter intake length improves high rpm engine power and acceleration feeling.

  • Dual exhaust ports improve air-charging efficiency.

  • Compact dual muffler with more-gradual pipe bends smoothen exhaust flow.

  • Electric-start standard for easy starting.

All new 2018 Honda CRF250R breaks cover
All new 2018 Honda CRF250R breaks cover
CHASSIS

The 2017 CRF450R set new standards for vehicle packaging in a motocross machine, with highly concentrated mass and a very low center of gravity; the 2018 CRF250R follows suit, with weight reduced overall but particularly up high and at the ends of the vehicle.

Layout is slim and low, and the machine has superb rear-wheel traction but minimal front-end lift‰ÛÒideal for strong starting and acceleration. The main spars of the new-generation, lighter aluminum frame are now tapered to optimize flex characteristics and provide good stability and reliable rider feedback, while a shorter wheelbase improves overall agility.

An all-new titanium fuel tank and extruded subframe end save precious weight up high, a new Showa coil-spring fork contributes a plush suspension feel, and a lower, more centralized shock location improves stability. Bodywork mirrors the design of the CRF250R‰Ûªs bigger brother in form and function, with a minimalist appearance and in-mold film graphics. Dunlop‰Ûªs superb Geomaxå¨ MX3S tires are standard.
All new 2018 Honda CRF250R breaks cover
All new 2018 Honda CRF250R breaks cover
  • Shorter wheelbase for lighter handling.

  • Lower center of gravity reduces front-end lift and contributes to better acceleration performance.

  • Reduced swingarm length improves rear-wheel traction

  • Lightweight aluminum frame with tapered main spars improves rider feedback.

  • Extruded-aluminum subframe brackets contribute to reduced weight and lower center of gravity.

  • Titanium fuel tank contributes to reduced weight and lower center of gravity.

  • Showa coil-spring fork enhances plush suspension feel.

  • Lower, more centralized shock location improves stability.

  • Dunlop Geomax MX3S tires for superior bump absorption and grip in wide variety of conditions.

  • Smooth bodywork layout eases rider movement.

  • In-mold film graphics for added durability.

  • Carefully shaped front fender allows efficient air path to radiator.

  • Consult owner‰Ûªs manual for optional racing parts

  • Specifications subject to change



All new 2018 Honda CRF250R breaks cover

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