Polaris ATV 2002 Owner's Manual page 146

MAINTENANCE AND LUBRICATION
Adjustments
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
forward 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
CAUTION
3/16"-3/8" (.48 cm - .95 cm) Deflection
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