Thats a stock clutch from a EZ GO workhorse golf cart, they ran 16hp Vanguards for a few yrs. it has a m30 taper but its not hard to switch up to a 1", that 20hp Honda came from the factory with the m30 taper. the Vanguard 16 did also, clutch was MFG by/for Polaris so theres a lot of spring options, same clutch was used on all EZ GO 4 cycles from 91 to 07. i plan on runnin' a one wire GM alt off it.