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10. DRIVE PULLEY/DRIVEN PULLEY/CLUTCH MXU550EXi/MXU500i
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· The drive pulley, clutch and driven pulley can be serviced with the engine installed.
· Avoid getting grease and oil on the drive belt and pulley faces. Remove any oil or grease from
them to minimize the slipping of drive belt and drive pulley.
· Do not apply grease to the movable drive face and weight rollers.
SPECIFICATIONS Unit: mm (in)
Item Standard Service Limit
Drive belt width 34.1 (1.364) 30.8 (1.232)
Clutch shoe thickness 1.5 (0.06) 1 (0.04)
Driven pulley spring 124.3 (4.972) 121.3 (4.852)
Weight roller O.D. 29.9 (1.196)30.1 (1.204) 29.5 (1.18)
TORQUE VALUES
Drive pulley nut 14 kgf-m (140 N-m, 100.8 lbf-ft) Apply oil to the threads
Clutch nut 14 kgf-m (140 N-m, 100.8 lbf-ft)
Driven pulley nut 10 kgf-m (100 N-m, 72 lbf-ft) Apply oil to the threads
Driven pulley assembly plate nut 7.5 kgf-m (75 N-m, 54 lbf-ft)
SPECIAL TOOLS
Oil seal & bearing install A120E00014
Bearing puller A120E00037
Y-type holder A120E00056
Drive pulley holder A120E00058
Driven pulley spring compressor A120E00059
Lock nut wrench A120E00079
TROUBLESHOOTING
Engine starts but ATV won`t move Lack of power
· Worn drive belt · Worn drive belt
· Broken ramp plate · Weak driven face spring
· Worn or damaged clutch lining · Worn weight roller
· Broken driven face spring · Faulty driven face
Engine stalls or ATV creeps
· Broken clutch weight spring
10-2