ok, where do I start? Yamaha Stunt, minarelli vertical air cooled engine. Had my 70cc Naraku kit seize on me so replaced it with a normal 50 kit, had a few more issues and, to cut a long story short, I renewed everything, couldn't cure the problem and bought another complete engine. Turns out the problem is still there - and this is it. The motor runs perfect when the 2-pin plug with a white wire and a yellow/red wire is disconnected. As soon as that is connected the engine misses and has less power. I've tried uncoupling all the plugs and it seems to be worse on the headlight plug, but I cannot find anything wrong in there ☹️ I've spent sooo much money on this and I still can't use it to go to work on or the shops! Any ideas? I do love the little thing but it stands me at about £600 now and that's serious money ☹️
