I just purchased my XP 850, I have about 100 miles on it, it seems very underpowered to me, I revs out at 7100rpm... and does about 61-65mph, does the computer limit the engine for a break-in period?
My grizzly seemed to be under powered as well until I reached a certain number of hours and then it seemed to wake up.I would give the dealer a call and see what they say.
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08 Grizzly 700 fi eps with a warn 2500# winch