Bike does not do it every ride. Bike runs perfect on some rides but will die several times on another ride. I have rode on a Saturday and it would act up and rode at the same location the next day and the bike was perfect. It seems to do it on aggressive braking and getting back on the throttle, even with minimal throttle. I put in a jd jet kit and a boyeson leak jet and still have the problem. When the bike is running good it's starts easy. But when it dies it's very hard to start. I'm thinking maybe a firing problem but any advice would be appreciated.