I compared the stock clutch off my 92 750 with the stock clutch(I think) off my vmax 600 and there was maybe .005 difference with them laying flat on a piece of steel. The only thing I really couldnt measure was the angle on the sheaves, I know that 92's were cut at 12.5 deg and 93-94 were 13 deg, I have no idea what a 500 or 600 are.