9. DRIVE AND DRIVEN PULLEYS MXU 300/250
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· The drive pulley, clutch and driven pulley can be serviced with the engine installed in the frame.
· 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.
SPECIFICATIONS Unit: mm (in)
Item Standard Service Limit
Movable drive face bushing I.D. 26.98927.052 (1.079561.08208) 27.06 (1.0824)
Drive face collar O.D. 26.9626.974 (1.07841.07896) 26.94 (1.0776)
Drive belt width 23.624.4 (0.9440.976) 22 (0.88)
Clutch lining thickness 0.5 (0.02)
Clutch outer I.D. 153153.2 (6.126.128) 153.5 (6.14)
Driven face spring free length 131 (5.24)
Driven face O.D. 39.96539.985 (1.59861.5994) 39.94 (1.5976)
Movable driven face I.D. 4040.025 (1.61.601) 40.06 (1.6024)
Weight roller O.D. 22.9223.08 (0.91680.9232) 22.8 (0.912)
TORQUE VALUES
Drive face nut 9.5 kgf-m (95 Nm, 68 lbf-ft)
Clutch outer nut 5.5 kgf-m (55 Nm, 40 lbf-ft)
Drive plat nut 5.5 kgf-m (55 Nm, 40 lbf-ft)
SPECIAL TOOLS
Universal holder E017 Clutch spring compressor E027
Bearing puller E008 Oil seal and bearing install E014
TROUBLESHOOTING
Engine starts but motorcycle 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 · Fouled drive face
Engine stalls or motorcycle creeps
· Broken clutch weight spring
9-2
Fast delivery and good communication ! The parts fit perfectly ! Thank you very much ! 
4.7 / 5