I have overhauled the top end of my A twin to fix smoking and leaking. I'm re-assembling the primary drive but the fit of the drive sprocket doesn't feel right to me. The washer that sits under the sprocket holds the sprocket just off the taper. I can tighten the nut to get it to grip and it must have been gripping OK before I took the motor apart but it doesn't feel right to me. I would have expected the sprocket to just grip when pushed on by hand against the washer rather than spin as it does now. It's not the original washer. If I make a new one so that the sprocket just grips when pushed on by hand will that give the correct interference fit? We are talking only a few thou so it won't worry the chain alignment.
Bill
Bill