With the stock tires ( anaconda's) the drivetrain seems to be fine, but ad a more sticky tire on back and the gears start ripping out one at a time. Until I finally found Hot Racing Jato hardend steel 2 speed gear set #SJT1000X on Ebay. I would also recommend installing A hardend steel clutchbell and spur gear, if you don't want to be replacing them every other time you drive your Jato. Also, the driveshafts need to be steel. The slipper clutch pads are crap. I took A piece of old radiator hose, cut it to the shape of the pressure plate and drilled little holes where the pins are to keep it from slipping on the wrong side. The only problem was it was twice as thick as the stock pads, so I cut it in half and made two at once. My Jato's driveline is now bullet proof! NO PROBEMS!!!