Polaris ATV 2001 Owner's Manual page 164

MAINTENANCE
Rear Drive Chain Slack Adjustment
(Models with Concentric Drive)
Never adjust or operate the vehicle with the rear drive chain
too loose or too tight as severe damage to the transmission
and drive components can result.
Check the amount of chain slack by moving the vehicle slightly for-
ward to gain slack at the top side of the rear chain. At this point
the chain should have 3/16"-3/8" (.48 cm - .95 cm) deflection (1).
If the chain needs adjustment, use the following procedure.
1
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3/16"-3/8" (.48 cm - .95 cm) Deflection