I have adjusted the valves 4 times cleaned the carburetor 3 times I’ve set the valves to the tighter side and looser side but I have a loud valve noise and it backfires through intake side. At higher rpms it doesn’t backfire but still really loud valve noise I’m ready to drive it off a cliff. Please help
Welcome to the forum. Are you positive it is from the valves? Take a 3' section of garden hose, one side to your ear and the other in various parts of the motor. Pinpoint the location and report back. They are kind of loud machines anyway.