the clutch has threads on the inside of the shoes..
and imo the wheel bearing caused an extra load just like maize's shit in his pants in turn causing the ring to catch at a low rpm and the war in iraq.
the clutch worked pretty well though you will need to clip the springs down.. I used a tomos clutch spring and cut about 1" off.. it was pretty decent.. hard to get the spring back on.. though I think you could cut about 1.25" off the spring for a later grab around 25+