mine has big tires and portals…I just put a new belt on(same part number) and I could see the old one was worn thinner and to me seems to engauge at a higher rpm.i never looked at rpm before this….went riding and about 8 to 10mph mine runs 3900 to 4000 in low.(high gear is not for trails)..we mud riders ride slow.LOL..just seems to be where it engages enuff to move ,,,does that sound about right?road all day and no belt slipping or smell or belt dust…get in a hole and of course I have to step on it harder and 5000ish it just comes to life and charges forward to say the least….I do not know if it has a clutch kit or if it even need one…the portals gear it down like 30% so it aint a speed demon for sure.

opinions please as this is my first rzr..