while I was riding down the road it just stopped running and will not start.RdRcr150 had the same problem in April,but do not know if he fixed the problem. I have a 2002 model. F1 system is ok. Put gas in the throttle body and it would start and run untill the gas was burned up. Tip over switch looks ok and does not have F1 problem code.May be fuel system(pump). How would check it.