My 850HO has 700 miles...no belt issues.
'03 500HO has 2300 miles....changed it around 1000 miles before going to Hatfield McCoy, belt was not worn never changed it again.
'03 700 has over 5000 miles...never a belt issue just changed at 1500 miles because purchased it used, belt still on it.
the belt changed were replaced with OEM Polaris belts.