I have a 96' KDX 200. I was riding over the weekend and when I loaded my bike into the truck I noticed that the clutch case was broken. (the case with the little window for viewing oil level). The crack was in the top 3/4 of the case and was not huge, but large enough for oil to leak out. I am not sure how long I had ridden with the crack, but the bike ran fine, and I experienced no problems. What type of damage could there be? What should I look for? (clutch slippage, etc). What repair recommendations should I follow other than replacing the case and the gasket?