I have a 2015 sportsman 570 EPS EBS and it’s lacking the low and mid grunt that it use to have when I first bought it. When I first purchased the machine, my dealer changed the clutch weights for higher elevation (Utah) but, I ended up hitting the rev limiter and they switched the weights back. Once they switched the weights back, my machine lost some of its grunt and I just assumed it was normal and so I continued like that for the past 1000 miles. What made me realize that it is not normal is when I raced my brother who has a 2015 sportsman 570 base model. His machine would pop a wheelie and slowly pull away from mine. After he whooped on me, I decided to get on his machine and it made me sad how much my machine lacks the grunt his has. So I bought a new belt and clutch kit last week from Ryan, and then tried multiple setups with different springs, and switching between stock weights and the new weights. Even with all the different setups, my bother beat me every time. Not once would my machine lift its front end up, even with the clutch kit and stock tires.

I have talked to Ryan from RVS Performance about this and he suggested a few things that might be the problem. Such as I might need a new belt, clutches needing to be cleaned, and maybe needing some new bushings. I have bought a new belt and scrubbed the clutch sheaves with a scotch brite pad but, have not messed with the bushings. Besides for those few things, is there any other things that could be causing the lack of grunt?

I am looking for suggestions of possible causes to help better diagnose the problem and make the dealer fix it when I take it in this week.

Thanks guys.