My son was riding my '05 Beta Rev 3 and he said it just died when he was going slow after an hour long ride in the hills, then the kick start was totally frozen. I initially thought he scorched the piston but it seems fine. Then I thought the kick starter gear might be jammed but that's not it either. No shimmer in the oil and it had plenty of coolant so I don't think it overheated. The + wire connection to the fan was a bit loose so it might have not been running but I assume it would have caused a seized piston if that was the culprit. I can move the piston without the jug installed by hand turning the rear wheel with it in 5th but it's pretty tough and I feel like it should move freely without anything causing compression. That makes me suspect the crankshaft bearings or something in the gearbox but I don't know any other tests besides splitting the case. Also still can't make the kick starter move after removing the jug. Anyone have any experience with these symptoms? Thanks