I am trying to help a friend out. He rebuild his 1987 banshee's top end. It does not want to run right now. It is hard to start IMO. And once running, just as soon as the bike starts to hit the powerband, it falls on it's face. It really feels like a false rev limiter.
It has set a long time before rebuilding. It's in my possession and here's what I've found out about it. Both cylinders are holding nice compression. Pistons are in right. Reeds look good. Carbs are clean and jetting is close. It has t-3's for now. I'm confident it's not mechanical issues... i.e. carbs, pistons, reeds, etc. I'm thinking electronics. Either stator, cdi, coil, etc. It's spark looks weak to me when I kick it. Reminder.. hard to start and it's probably blowing the flame out once on the band. That's where I need your experience... is there anything I can test for? Where would you start?
Thanks
Adam