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Introducing the all-new 2021 Honda CRF450R motocross bike. The CRF450R receives a wide array of improvements and upgrades under a development theme of ‘Razor-sharp Cornering’. 2kg lighter, thanks to a revised frame and subframe. The new frame and swingarm’s rigidity balance, combined with tighter chassis geometry, heightened ground clearance and suspension changes, are all targeted at creating optimal cornering performance.
The engine also benefits from HRC’s strong focus on low to midrange torque. The decompressor has been relocated, airbox volume is up, the throttle body redesigned and exhaust ports reshaped. The exhaust downpipe is new and a single muffler replaces dual mufflers. A larger volume hydraulic clutch has an even lighter lever action, while other weight saving details include a smaller fuel pump and optimised magnesium cylinder head cover.
2021 Honda CRF450R Key Features
Chassis
-Narrower main spars and new rear subframe save weight, drawing on HRC knowhow.
-Narrower swing arm spars and swingarm pivot point, with revised swingarm rigidity balance.
-Geometry changes combined with the above to improve cornering ability.
-Revalved front suspension with an extra 5mm stroke matched with revalved rear shock.
-Improved ergonomics from smaller new seat, and more compact, redesigned plastics.
Engine
-Larger airbox plus revised throttle body and exhaust ports for bottom end drive.
-New exhaust downpipe with single muffler boosts torque and saves weight.
-Larger volume hydraulic clutch replaces cable operation for consistent drive.
-Revised decompressor system gives improved stall resistance.
Electronics
-Honda Selectable Torque Control (HSTC) with 3 riding modes, plus OFF.
-HRC Launch Control offers 3 start options.
-Engine Mode Select Button (EMSB) features 3 maps to adjust output character.
-HSTC button now rationalised into the lefthand switchgear.
-HRC setting tool updated for changes to Aggressive and Smooth modes.
