kymco mo yup50 Instruction De Maintenance

. KICK STARTER/DRIVE PULLEY/

CLUTCH/DRIVEN PULLEY

8-2

YUP 50

SERVICE INFORMATION

GENERAL INSTRUCTIONS

• Avoid getting grease and oil on the drive belt and pulley faces.

SPECIFICATIONS

YUP 50

Item

Standard (mm)

Service Limit (mm)

Drive pulley collar O.D.

20.01

20.025

24.24

Movable drive face I.D.

20.035

20.085

19.97

Weight roller O.D.

8.5

8.2

Clutch outer I.D.

107

107.2

107.5

Driven face spring free length

87.9

82.6

Driven face O.D.

33.965

33.985

33.94

Movable driven face I.D.

34.0

34.25

34.06

Drive belt width

TORQUE VALUES
Drive face nut

3.5_ 4.0kg-m

Clutch outer nut

3.5_ 4.5kg-m

Clutch drive plate nut

5.0_ 6.0kg-m

SPECIAL TOOLS
Lock nut wrench, 39mm

Universal holder

Clutch spring compressor

Lock nut socket wrench, 32mm

Bearing outer driver 37x40mm

Bearing driver pilot, 17mm

One-way clutch puller

Outer driver, 24x26mm

TROUBLESHOOTING

Poor performance at high speed or

Engine starts but motorcycle won‘t move

lack of power

• Worn drive belt

• Broken ramp plate

• Weak driven face spring

• Worn or damaged clutch lining

• Worn weight roller
• Faulty driven face

Engine stalls or motorcycle creeps
• Broken clutch weight spring