Conner, thanks for that. Might give it go then. Looking thro' the plug hole it does'nt look like a standard TS low comp. piston! I put a picture of the bike up on the Newbie site. The carb. is way too big, should be a 22mm. Where can I get things like head gasket, oil filter ect? I have a concentric the right size, going to try that.
Hi Conner, I see that you still visit and wondered how you are getting on with the 250? including below just for my ref/notebook - shows advance/retard mech "successfully removed" on a single.