You're hearing the engine rev high so it can stay in its peak horse power range. There are a few different aftermarket companies making clutch kits for these RZRs. Check that out and see if there are any reviews showing it helps with the RPM range.
Has the Pro XP clutch and is geared very low. Good heavy doors with seals. Same old front diff. though. They down graded the rear brakes to the single piston caliper. Why?
