Polaris 2003 Universal Snowmobiles - Manual (Page 146)

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MAINTENANCE
General Maintenance
Clutch System
Inspect clutch sheaves for damage, wear, or belt residue. Clean with
non-oil based cleaners such as isopropyl alcohol.
All clutch maintenance and repairs must be performed by an
authorized Polaris dealer. Any unauthorized modifications to
clutches, such as adding or removing weights, will void the
warranty.
If you become aware of higher than normal clutch engagement,
an unusual vibration, or an unusual shift pattern, contact your
dealer immediately. Do not operate the machine until
corrections have been made.
WARNING
Do not lubricate clutch bushings. The bushings in the
weights and rollers of Polaris clutches are made of a
material that may be damaged if lubricated. Clean clutch
sheaves periodically to maintain optimum performance.
CAUTION