I can ride at a moderate speed without going wide open throttle and it rides good. As soon as I hit it wide open I'll ride it wide open as far as I can or road will give. And I let go of the throttle and Boggs down? Then it won't crank back up. Gotta let it sit for like 5 min without touching it. Good compression new sparks. Good gas and ratio mix. Carbs are synced. Cleaned good to go Idk what it could be.