Above all, the new chassis and redesigned OHC engine widen the 450 EXC's lead over the competition by a further bike length. BODYWORK
The newly developed Keihin engine management system with electronic fuel injection ensures spontaneous responsiveness from the engine. The 450 EXC's new engine is equipped with a common oil circuit for engine and transmission, and two oil pumps. NEW BALANCER SHAFT
This intelligent multi-functionality contributes to the compactness and low weight of the 450 EXC's new engine.
NEW ENGINE CASE
Thanks to the new, lighter connecting rod and the new, lighter piston, they managed to achieve minimum vibration, while maximising engine-speed strength.
The 450 EXC's cylinder has been further developed especially for the new engine configuration. The new, 15 % lighter forged piston minimises reciprocating weight and optimises durability at high engine speeds. New, nitrided piston rings ensure highest levels of resistance to wear.
All ports and the combustion chamber have been redesigned in the OHC cylinder head of the 450 EXC's new engine. NEW CLUTCH
NEW FRAME
The 450 EXC's new, lighter, cast aluminium swingarm accommodates the shock absorber more centrally, in order to load the swing arms more evenly.
