Well I think I just toasted my motor boys I was running my XB and everything was fine it just stopped and will not start again it doesn't seem to have much compression by the feels of things are they just weak motors or what I'm running hd clutch with 8000rpm spring,813 Walbro carb and just put on jetpro side pipe theirs probably 8-10 tanks through the car has anybody had problems with these motor and I guess what should I get to fix or make better