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2.6 CRANK MECHANISM
2.6.1 Removal, Maintenance and Installation
1
）
Check the mainshaft bearings, countershaft bearings and crankshaft bearing.
Replace them if necessary
2
）
The construction of crankshaft, mainshaft comp., countershaft comp.,
gearshift drum, forks, etc. is shown as following figure.
3
）
Remove the crankshaft and connecting rod. Check the timing drive gear for
wear. Replace the worn-out gear with a new one. Note: The “O” mark of timing
drive gear should be aligned with crank woodruff groove.
4
）
The construction of connecting rod is shown as following figure. Measure
the gap of connecting rod big end. If it is out of the service limit, replace the
connecting rod.
Service limit of radial play: 0.05mm Service limit of axial play: 0.60mm
TIMING DRIVE
GEAR
