it sounds like it will fit Phil,they are being advertised as "B4/SC10" ect ect,I asked as my clutch is very sensitive to adjustment,a slight movement of the nut and it goes from no slip to too much,so I was hoping this would help and give a more gradual adjustment-i`m going to give it a try.....On some of the forums some have commented about the extra rotating mass,but it wont be as heavy as the brass flywheel so I dont see it as a problem-only one way to find out!!!