ENGINE / DRIVE The CMX is powered by a 471cc, eight-valve, liquid-cooled parallel twin with strong bottom-end torque and a smooth, linear power delivery. The cylinder head uses roller rocker arms; shim-type valve adjustment allows them to be light, for lower valve-spring load and reduced friction. The CMX has a silent (SV Chain) cam chain, with the surface of its pins treated with Vanadium to reduce friction through its increased protection against dust.
The engine has reduced friction through the addition of striations on the piston skirt (a finish that increases surface area, introducing gaps in which oil can flow for better lubrication). An AB 1 salt bath process, used after isonite nitriding, forms a protective oxidization membrane. CMX crankshaft pins are phased at 180°, and a primary couple-balancer sits behind the cylinders, close to the bike’s centre of gravity. The primary and balancer gears use scissor gears, reducing noise. The crank counterweight is specifically shaped for couple-balance and its light weight allows the engine to spin freely, with reduced inertia.
The crankcase uses centrifugally cast thin-walled sleeves. Their internal design reduces the “pumping” losses that can occur with a 180° phased firing order. A deep oil sump holds 3.2 litres. Six-speed gearbox is designed to offer effortless changes. Blacked-out mechanical components for a tough, minimalist look. Specially designed muffler looks good and emits a pulsating exhaust note.