Alright, I'm working on my buddy's 86 250R. He has 12.5 to one compression, ESR TRX-6, 38mm air stryker carb and a cool head. All parts are new, fresh rebuild. I'm jetted the **** outta this thing and it we can't get it to run like it should. My stock ATC250R smokes it hard and that thing doesn't run right either. It won't rev very quick in the top end, seems like its cutting out. I think it may be an ignition problem. It also has a brand new stator, spark plug and wire. Could the flywheel be a problem? Looking for some suggestions.