RE: Grpro 100cc twin. or?
Peche,
What sort of Ignition is it, dose it say RCexl on the ignition? Also, look at the date sticker of the ignition (Assuming that it is a RCexl ignition, it should have a date sticker) This will give you an indication of how old the engine acctually is.
Is the ignition fitted with a Blue or red sticker?
regards
Andreas