This pic is after dismantled reduction gear.Problem is reduction gear won't return to original position after engine start.
See this picture of blue circle, it is missing holder arm of clutch weight holder plate. This is cause of problem as clutch weight lost hold and stuck to housing. When this problem happen engine will keep run after start however reduction gear also keep turn as well and that mean starting motor is turn too and very much high speed.Do you understand what I'm saying? In short usually reduction gear will return to original position after engine start and disconnect transfer between flywheel to reduction gear but if doesn't reduction gear will keep turn also starting motor turn too.
In worst case starting motor will get burned and damage cause by incredible high speed turn.
This reduction gear are use all Yamaha model except 4stroke model also all Kawasaki.
Yamaha and Kawasaki are both same reduction gear but only Yamaha supply service kit for reduction gear as holder plate and weight holder spring. However these service parts can be use for Kawasaki's reduction gear.
