Ok I don't have a kill switch and I use the choke to kill the motor. Since I'm out of the 16 to 1 ratio and now at 32 to 1 the choke will not kill the motor unless I give it a little throttle. I'm also 4 stroking at wot. I'm afraid to rejet leaner since that's my conclusion on it not killing the motor but I need to rejet leaner due to 4 stroking. Carb is clean, fuel filter is good, and head is properly torqued. Any thoughts?