Hello-I just joined this sight and already have a question. Do most aatv use a torque convertor type centrifical clutch? My catagator uses a hydraulic type clutch where the clutch halves go together by hydraulic preasure from a foot pedal. I plan on upgrading to a Vangaurd engine and the appropriate clutch. I like the hydraulic set up but my machine sat for 24 years and the clutch cylinder is rusted beyond repair. I live in the Upper Penninsula of Michigan where the winters are long so I have a good winter project ahead of me. Thanks Packrat