Andy,
I'm in Cleveland (N.York's),
Swapping part's is probably the next step, problem is it can take up to an hour or more for the problem to develop. If at all.
It's not like a misfire, where a prod on the kickstart and the problem either is or isn't cured...
I'll try and get a good run on it this w/end and see what it's like (kinda hoping the TPS may have been at fault, but I thought that once before!
Maybe I should strip the p/valves like Dave say's just to eliminate them. Do they need lubing before reassembly, if so with what?
Thanx regard's Phil
I even put a bid on ebay for that SP motor (in a moment of madness), must've been something in that lot to cure it!