Kymco MO MXU250 Service Manual - chap10 (riduzione finale)
10.FINAL REDUCTION/
TRANSMISSION SYSTEM
MXU 250
10
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FINAL REDUCTION/TRANSMISSION SYSTEM
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SERVICE INFORMATION------------------------------------------------ 10- 2
TROUBLESHOOTING----------------------------------------------------- 10- 2
TRANSMISSION CASE COVER --------------------------------------------- 10- 3
TRANSMISSION------------------------------------------------------------ 10- 5
SPEEDOMETER GEAR --------------------------------------------------- 10-15
10
10-0
10.FINAL REDUCTION/
TRANSMISSION SYSTEM
MXU 250
10-1
10.FINAL REDUCTION/
TRANSMISSION SYSTEM
SERVICE INFORMATION
GENERAL INSTRUCTIONS
• The transmission system can be serviced with the engine installed in the frame.
• When replacing the drive shaft, use a special tool to hold the bearing inner race for this operation.
SPECIFICATIONS
Specified Oil: GEAR OIL SAE 90#
Oil Capacity: At change : 0.3 liter (0.264 lmp qt, 0.318 US qt)
At disassembly : 0.4 liter (0.352 lmp qt, 0.424 US qt)
TORQUE VALUES
Transmission case cover bolt 2.7 kgf-m (27 Nm, 20 lbf-ft)
MXU 250
TROUBLESHOOTING
Engine starts but motorcycle won‘t move
• Damaged transmission
• Seized or burnt transmission
Oil leaks
• Oil too rich
• Worn or damaged oil seal
10-2
10.FINAL REDUCTION/
TRANSMISSION SYSTEM
TRANSMISSION CASE COVER
REMOVAL
Drain transmission gear oil into a clean
container. (Refer to the “TRANSMISSION
OIL REPLACEMENT” section in the chapter
3)
Remove the three bolts and then remove the
drive sprocket cover (see page 6-3).
Remove the two bolts and then remove the
washer and drive sprocket (see page 6-3).
Remove the bolt and then disconnect the
drive shift arm from the shift shaft (see page
6-3).
Disconnect the speedometer cable (see page
6-3).
MXU 250
Remove the transmission case cover
attaching bolts.
Remove the transmission case cover, dowel
pins and gasket.
Bearings
Bolts
Transmission Case Cover
Inspect the bearings for allow play in the
transmission case cover or the bearings turn
roughly.
If any defects are found, replace the bearing
with a new one.
10-3
10.FINAL REDUCTION/
TRANSMISSION SYSTEM
MXU 250
TRANSMISSION CASE COVER
DISASSEMBLY
Remove the drive axle circlip.
Remove the drive axle from the transmission
case cover.
Remove the bearing circlip for remove the
bearing.
Inspect the bearing for allow play in the
transmission case cover or the bearing turns
roughly.
If any defects are found, replace the bearing
with a new one.
Inspect the drive axle gear teeth for wear or
damage.
Bearing Circlip
Drive Axle Circlip Drive Axle
Bearing
Remove the bearing to expose the oil seal.
Inspect the oil seal for wear or damage.
If any defects are found, replace the oil seal
with a new one.
Oil Seal
10-4
10.FINAL REDUCTION/
N
N
TRANSMISSION SYSTEM
MXU 250
Inspect the needle bearing for allow play in
the transmission case cover or the bearing
turns roughly.
If any defects are found, replace the bearing
with a new one.
ASSEMBLY
Install the needle bearing.
Install the oil seal and bearing.
Install the bearing circlip.
Install the drive axle and drive axle cirelip.
eedle Bearing
eedle Bearing
TRANSMISSION
REMOVAL
Remove the transmission cover. (Refer to the
“TRANSMISSION CASE COVER REMOVAL” in
the chapter 10)
Check the transmission operation.
Unsmooth operation → Repair.
Bearing
10-5
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