Yingang YG125-23, Maintenance Manual

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YG125-23Maintenance ManualCrankcase, crankshaft and Shift mechanism
101
Variable transmission system
To remove the variable transmission system:
1.
Remove the (left hand) crankcase (See “Removal of
left hand crankcase").
2. Remove the shift fork shaft.
3. Remove the gearshift drum.
4. Remove the shift fork.
5. Remove the driving/driven shaft
To mount the variable transmission system:
1. Place the right hand crankcase assembled with
crankshaft and balance shaft on the assembly
operating table, and the driving/driven shaft and
assemble the them together.
2. Assemble the shift fork with
3. Mount the gearshift drum.
。
4. Change the O-shaped sealing ring, mount the shift
fork, and check whether the driving/driven shaft can
rotate freely
5. Mount the shift arm
6. Replace it with a new paper pad assembly one while
assembling
，
mount the left hand crankcase(See
“Installation of crankcase")
Notice:
Only assemble when the temperature reaches 106
℃
,
otherwise it can’t be assembled. Never forcefully
strike it!
Driving shaft
Counter shaft
Gearshift drum
Driving shaft
Counter shaft Gearshift drum
drum
Shift arm