The crown, although it looks bad, is entirely serviceable...A picture of the gudgeon pin taken looking at the end would help to identify the piston...Did you get a pin and circlips with it?...If not you will have to examine the circlip grooves closely to ensure you use the correct type (flat form or wire) and ideally, pick up a BSA gudgeon pin...
I'm going away tomorrow for approx. 3 weeks and don't have sufficient time to make ring thickness comparisons with original BSA rings...However, it is quite possible I have an original set of BSA +.060" rings...Good luck with your hunt in the meantime..I'll catch up with the posts when I return home...Ian
Hi Ian,
thanks for the reply. No pin or circlips but the pin from the old oem piston is a perfect fit. Here's a pic of the piston from the side.
https://ibb.co/kkPPZc0
Thanks again!.
T
It's probably been due a rebore for 50 years so I don't think another 3 weeks will make much difference!
