TailGater, you might want to have you tach calibrated first. They can be off as much as 300-400 rpm. Once you know the tach is right then, look at the pin weight in the primary clutch. I have an '02 MXZ 800 and it is right at 7900 and I cant believe that the weight can be that far off unless it has been changed. For that reason I would go to the tach first.