Hello, I am working on a 400 big bear 2wd 99-01 I think, being new to the 4 wheeler scene, I thought I would try to get some advice from some more experienced folks like you. The problem I am having is an oil leak in the cylinder/head area. It only leaks when being driven, not idling or when revving in neutral. I have replaced the head and cylinder gaskets and it still leaks. The oil seems to be being thrown onto the upper frame and onto the front chase area. Any thoughts???