I just drilled the 8 1/2 inch holes in each of my pipes. Ran great, sounded better no issues. This week I'm stalling at idle, restarts easily. I can hold the throttle at 800-1000 rpm and runs just like before. Can I just increase the idle, if so can someone tell me how to do this. On my dirt bikes and other bikes easily found and adjusted, in 109 land I'm lost! Thanks for any help