This was on a minibike that had sat in the mud for years and the frame was rusted out totally and I cut it up so no one would get hurt on it . The motor still ran and the clutch worked but the driven is missing parts and I am not sure what kind it is to research what is missing from the driven . it is an assymetrical 3/4 driver and 5/8 driven is the shaft sizes . Is there anyone who uses this setup and knows anything about them ??