I have a 205 Kodiak 450 which I purchased new. On the last ride, I stopped for 15 minutes, got back on, the machine had only about 30% power, about 20 MPH, now it won't even go up a hill at my home that has a medium slope.. I had the carburetor rebuilt and replaced the belt. The ATV starts great, engine revs up like new. Shifts excellent, however it will not go over 12 mph. My next thought is the issue might be with the wet clutch needing to be replaced. What is puzzling is that you would think the engine would rev up if the clutch is slipping. Any Thoughts?