Features may include:
Engine & ElectronicsRe-imagined, re-engineered, re-energized. Making the best 450 even better required major changes to just about every component, with the result being a bike thats lighter, more powerful, better handling, and even easier to ride fast.
Under the development theme of The Ultimate Off-Road Weapon, the CRF450RX is 5 lb. lighter thanks mainly to a revised frame and subframe. The frame and swingarms rigidity balance, combined with tighter chassis geometry and suspension update, all help to create optimal cornering performance.
A significant increase in peak power above 5,000 RPM is accompanied by stronger low-RPM torque feel, thanks to a larger airbox feeding a 46 mm throttle body that improves intake efficiency and makes active use of latent vaporization in the inlet ports. The injector angle has been radically changed to 60 degrees from 30 degrees spraying fuel all the way back to the butterfly valve, which improves intake efficiency, throttle feel, and cooling of the charge.
Chassis & SuspensionWith direct input from the HRC race team, the twin-spar aluminium frame has been thoroughly revised to reduce weight and to elevate every aspect of its cornering ability. Thanks to narrower main spars and a redesigned subframe, it is significantly lighter than it's predecessor. Chassis dynamics are also new while torsional rigidity is maintained, lateral rigidity has been reduced by 20% to increase corner speed, traction, and steering accuracy. The aluminium swingarm has a new rigidity balance tuned to match the frame, with narrower arms and pivot point, plus a revised Pro-Link ratio.
Big changes to the 450 cc Unicam engines exhaust ports. As with the CBR1000RR-R Fireblade, their exit is oval rather than round in shape for improved efficiency, and the twin exhaust design of the previous model has been replaced by a single downpipe and muffler, saving a full 1.24 kg (2.7 lb.). The downpipe also tucks in 74 mm closer to the centre line, improving rider ergonomics.
Fully adjustable, the 49 mm Showa USD coil-spring fork is a version of the Showa 'factory' fork supplied to race teams in the Japanese championship. For smoother cornering performance, the fork has been revalved, stroke lengthened by 5 mm, and the axle clamps rigidity increased. The Showa rear shocks main piston valve has been enlarged for faster response and improved bump absorption; its spring also uses the worlds lightest steel, saving 200 grams.
AdditionalFor longer cross-country loops, the CRF450RX features a bigger fuel tank that holds a full 8 litres.
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Features may include:
Engine & ElectronicsRe-imagined, re-engineered, re-energized. Making the best 450 even better required major changes to just about every component, with the result being a bike that’s lighter, more powerful, better handling, and even easier to ride fast.
Under the development theme of The Ultimate Off-Road Weapon, the CRF450RX is 5 lb. lighter thanks mainly to a revised frame and subframe. The frame and swingarm’s rigidity balance, combined with tighter chassis geometry and suspension update, all help to create optimal cornering performance.
A significant increase in peak power above 5,000 RPM is accompanied by stronger low-RPM torque feel, thanks to a larger airbox feeding a 46 mm throttle body that improves intake efficiency and makes active use of latent vaporization in the inlet ports. The injector angle has been radically changed — to 60 degrees from 30 degrees — spraying fuel all the way back to the butterfly valve, which improves intake efficiency, throttle feel, and cooling of the charge.
Chassis & SuspensionWith direct input from the HRC race team, the twin-spar aluminium frame has been thoroughly revised to reduce weight and to elevate every aspect of its cornering ability. Thanks to narrower main spars and a redesigned subframe, it is significantly lighter than it's predecessor. Chassis dynamics are also new — while torsional rigidity is maintained, lateral rigidity has been reduced by 20% to increase corner speed, traction, and steering accuracy. The aluminium swingarm has a new rigidity balance tuned to match the frame, with narrower arms and pivot point, plus a revised Pro-Link ratio.
Big changes to the 450 cc Unicam engine’s exhaust ports. As with the CBR1000RR-R Fireblade, their exit is oval rather than round in shape for improved efficiency, and the twin exhaust design of the previous model has been replaced by a single downpipe and muffler, saving a full 1.24 kg (2.7 lb.). The downpipe also tucks in 74 mm closer to the centre line, improving rider ergonomics.
Fully adjustable, the 49 mm Showa USD coil-spring fork is a version of the Showa 'factory' fork supplied to race teams in the Japanese championship. For smoother cornering performance, the fork has been revalved, stroke lengthened by 5 mm, and the axle clamps’ rigidity increased. The Showa rear shock’s main piston valve has been enlarged for faster response and improved bump absorption; its spring also uses the world’s lightest steel, saving 200 grams.
AdditionalFor longer cross-country loops, the CRF450RX features a bigger fuel tank that holds a full 8 litres.
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