thanks a million for the reply, I'll do that, makes great sense, the bike does not charge, I can't start it though till I find the carb manifolds, as cylinders 1 and 4 are ripped and I'm told they can't be found, discontinued, the bike is not mine, I'm familiar with the basic charging systems on the brit bikes, so far I don't know what plug in device is even the regulator, is the zenor and rectifier combined in a package?