- Jul 11, 2016
About a week ago I bought a 2-stroke 80/66cc bike kit. I installed it and after startup problems at first I managed to get it running smoothly, the only problem is, it is way too slow. It struggles to stay at 20mph with the throttle wide open. I checked the carb and the throttle runs fine, so it's not that. I'm using 20:1 oil to fuel on a 26" mountain bike. PLEASE HELP!