Chuck, I have a 89 8V-92. I have 250K on it. I can tell you heat is the biggest problem with the two strokes. The interesting thing that I have found out I do not worry about RPM's but rather heat. I drive by my PYRO's. Keeping the PYRO's between 900-1000 I get my best pulling performance. I some times back off the petal going up hill and find I lose less speed. Remember two strokes need air. If you have the PYRO meters try to find your best temp over a load. I think you will be surprised at the results you will find. And by the way welcome. Love to see your bus. Come to Kerrville next OCT to show it off.

Gary Moss