gday prd yes sorry I meant drive clutches on drive pulleys upon further inspection and cleaning I found it to be cork glued on top of cork just looked like black rubber that was cut out roughly so your dad and dave repair comment is right. doing some reading over night it looks like instead of shim adjusting to close down the gap they bodged another piece of cork on top so it would drive.... thanks for the engine clutch info mines getting pretty thin. thanks for your help
