Can anybody give me any insight on how to do this? Since getting the bike, it had no power and backfired. I’ve went through the carb and it runs 10x stronger now, but still backfires some and cuts out some at wot when warm. Which leads me to think the valves are out of adjustment. The engine was rebuilt, and has about 10-20 hours on it now, which again leads me to valves.

I’ve checked the boots on both sides of the carb, both are intact and sealed well. I adjusted the air/fuel mixture because it was running lean, which I thought was going to fix the problem. It did help quite a bit, but the problem is still there. If I back out the screw anymore, it’s going to start running rich, it’s already borderline now.

Can anybody give me any tips on adjusting the valves?