My bike runs great. Its a little hard to start with the electric starter but starts on the first kick. Anyways, my bike sputters and loses power when I go over washboarded or hard rock-packed roads and large bumps. It loses power and then after the washboard area it comes back to life again. I know that there could be a million possible causes, but I was curious if anyone could shed some light on the subject. I know that its NOT my kick stand switch. I have good gas in it and all my fuel connections are tight. I have read about the gas cap vent. Does anyone actually know where it vents from? I do have a tank bag strapped tightly to my tank and it covers the cap. Could this be the problem? The weather hasn't allowed me to go out and test it without the bag yet. Thanks.