I have an 09 sportsman 850xp when I first got it I was only able to go 56mph found a burnt belt and replaced it still only able to get 56mph didn’t matter 2wd or 4wd …figured maybe springs in clutches are weak so got a QSC kit and lost 4mph now I’m at 50-52mph. Found battery was weak needed replaced so I recently replaced it and no difference 52mph at best. Any other ideas on what could be the problem? Filter is clean uni filter tires are stock 26" stock steel wheels no winch and also has no engine light codes either.

I’m at wits end with this thing, wanting to XC race it next year and will the the top speed for the long field sections.

Thanks for any help.

I have searched the forums for weeks tying to find a similar issue and haven’t been able to find one.