| The clutck is a new Sigma development (was a secret till I just blabbed it now!!).
It is based on the standard Sigma device but incorporates some of the ideas Neil Spalding picked up in the MotoGP padocks - specifically it incorporated a set of sun and planet gears, causing the heavier clutch drum to rotate "backwards" emulating the Yamaha MotoGP engine (with its backward rotating crank) and - in theory at least - reducing engine gyroscopic effect.
Having the engine gyroscopic effects opposite to those of the wheels (both rotating forward - usually) reduces the overall gyroscopic effect fely by the chasis and makes the bike more nimble, improves traction and reduces the tendency to wheelie under power. |