I hope someone can help. My bike was running great but after a service it was a disaster, miss firing for England. The garage say it is the points mounting plate which is around 100mm to 120mm in diameter and full of little holes. It allows two of thr point to be adjusted and the third is fixed but he says the plate just wont tighten up so the minute its put under pressure the points close up. Anyone know what the part is called or where i could get one? Im a bit desperate ive missed most of the summer riding already. Thanks