i just bought a n xr 600 that was plated in California. it was fun until the crankshaft stripped at the sprocket on the first day and now i get to weld and grind on it. it is stock other than a supertrap pipe. it has plenty of power so i am just curious. What is the stock gearing for this bike. i have a 50 tooth in the rear and about 70mph it is pretty done.