Get in touch with Gas Gas USA (in florida). They will be happy to help you resolve any problem with the bike. Most of the problems related to this bike were that the wiring harness was not routed very well and the wires for the EFI would chaff and short out. Also, keep a close eye on the starting clutch (the clutch is a part of the gear system under the ignition cover). When the clutch wears out the bike is impossible to start as when the piston arrives at TDC the clutch slips and the engine kicks-back.