matt16242

oh a 300ex i thought it was one of utility 300 if its a 300ex it must be the clutch plates there is no adjustments u have to just replace them not just take side case off and its like 5 or 6 screw bolts that hold therm in dont forget to buy a new side case gasket

it is one of the clutches it sounds to me like it is the centrifugal clutch but try to adjust the other first you can not adjust the centrifugal just replace it its not cheap unless you get a good used one