Fit in a day on the BSA. I managed to install the nos rear brake components so I now have a rear brake. Also realised that a Yoke I bought for 30 quid was a total waste of money. Its identical to the m20 one but with a 1" stem diameter instead of 1 1/8" which I need. Must be of a c11 or something. The b series yoke I have on there Does not hit the steering stops on the frame. Wanted - 1 BSA M20 bottom yoke.