Hi. I just got a '99 King Quad 300 as part of a trade. The thing is in almost new condition....only 300 miles on it, and not a scratch........except......the atv has a sheared off right rear axle. I have priced a new one on the internet at $209.00. Does this sound about right? Does anyone know what might cause the axle to break?? Is it a common problem on these machines? Also, what oil should I put in the engine? Thanks..Jon H.