Scooter Roberts· Registered
Discussion Starter · #1 ·
I recently got a rex 450 s from a friend. When I got the bike it was smoking and wouldn't run good. Backfiring and seemed to be choking out. I've had new rings, carburetor, and intake manifold. I can get it set to a good idle, but when you start giving it fuel it acts like it's choking out and backfiring. Has a rattle in the motor so adjust the valves to .006. Still have the rattle.