I wouldn't doubt if it was some kind of manufacturing defect with the timing gear. I had an 03' with that same junk Fuji engine. I had a cam, (the exhaust I believe) actually break in two. The valve nearest the gear worked while the other not. I also had the transmission drive shaft twist. It stuck in 2nd gear and wouldn't budge. When I tore it down you could look down the shaft and see an 8th inch twist from one end to the other. Anyways, good luck with that. My advice...buy one with a KTM engine.