
Honda's flagship 450cc four-stroke motocross racer, for experienced adult riders racing the premier class.
Most comprehensive update in a decade: lighter, more powerful engine and revised chassis and suspension.
Frame with 70% new components for more rigidity, new linkage and suspension; carried over unchanged for 2026.
New slimmer frame and bodywork with a single exhaust.
New frame and rethought Unicam engine, coil-spring Showa fork; electric start optional in 2017, standard from 2018.
Redesign with twin mufflers, KYB air fork and significant engine changes.
All-new fuel-injected bike with new engine and chassis.
Redesigned engine and frame with new bodywork; HPSD steering damper added in 2008.
Original Unicam four-stroke in a twin-spar aluminum frame; 2003 brought a longer shock and new linkage.
wet = curb weight per Honda: all standard equipment, required fluids and a full tank of fuel, ready to ride; dry = Honda "weight without fuel".
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