Kymco MO MXU250 Service Manual - chap09 (trasmissione)
9.DRIVE AND DRIVEN PULLEYS
9
MXU 250
DRIVE AND DRIVEN PULLEYS
SERVICE INFORMATION.................................................................... 9-2
TROUBLESHOOTING........................................................................... 9-2
LEFT CRANKCASE COVER ................................................................ 9-3
DRIVE PULLEY/DRIVEN PULLEY .................................................... 9-4
9
9-0
9.DRIVE AND DRIVEN PULLEYS
MXU 250
9-1
9.DRIVE AND DRIVEN PULLEYS
m
d
MXU 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)
Ite
Movable drive face bushing I.D. 26.989～27.052 (1.07956～1.08208) 27.06 (1.0824)
Drive face collar O.D. 26.96～26.974 (1.0784～1.07896) 26.94 (1.0776)
Drive belt width 23.6～24.4 (0.944～0.976) 22 (0.88)
Clutch lining thickness ⎯ 0.5 (0.02)
Clutch outer I.D. 153～153.2 (6.12～6.128) 153.5 (6.14)
Driven face spring free length ⎯ 131 (5.24)
Driven face O.D. 39.965～39.985 (1.5986～1.5994) 39.94 (1.5976)
Movable driven face I.D. 40～40.025 (1.6～1.601) 40.06 (1.6024)
Weight roller O.D. 22.92～23.08 (0.9168～0.9232) 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
Standar
Service Limit
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
9.DRIVE AND DRIVEN PULLEYS
r
t
MXU 250
LEFT CRANKCASE COVER
REMOVAL
Remove the five bolts.
Remove the recoil starter cover.
Remove the dowel pins and gasket.
Bolts
Recoil StarterCove
Gaske
Disconnect drive belt air inlet and outlet hose
from left crankcase cover (see page 6-5).
Remove the left crankcase cover bolts and
left crankcase cover.
Remove the gasket and dowel pins.
9-3
Dowel Pins
Bolts
9.DRIVE AND DRIVEN PULLEYS
t
Nut
r
INSPECTION
Inspect the bearing for allow play in the left
crankcase cover or the bearing turns roughly
→ Replace.
INSTALLATION
Install the dowel pins and new gasket.
Reverse the “LEFT CRANKCASE COVER
REMOVAL” procedures.
Install the left crankcase cover and tighten the
bolts.
Connect the drive belt air inlet and outlet
hose and tighten band screws.
Install the recoil starter cover and outlet hose
cover.
MXU 250
Bearing
Gaske
DRIVE PULLEY/DRIVEN
PULLEY
REMOVAL
Remove the left crankcase cover. (Refer to
the “LEFT CRANKCASE COVER
REMOVAL” section in the chapter 9)
Hold the drive pulley using a universal holder
and remove the drive face nut and ratchet.
Remove the drive pulley.
Special
Universal Holder E017
Dowel Pins
Drive Pulley
Universal Holde
9-4
Loading...