Behind the rope start on my Yamaha YTM 200 there is small oil leak coming from under whatever case is back there. On the case beind the pull start on the bottom. Looks like it was removed and put back in place with gasket maker and not a true gasket, so when it warms up, it drips a little. What does that case contain, and if i remove the pull start, and then that case to investigate, what kind of trouble could i get into?