Main Shaft: Service and Repair

DISASSEMBLY
1. Check end play of front drive sprocket.
Standard: 0.2 - 0.35 mm (0.0079 - 0.0138 inch)
If end play is beyond the maximum value, check front drive sprocket and clutch gear for wear.





2. Remove retainer ring, speedometer drive gear and steel ball. Be careful not to lose the steel ball.





3. Remove snap ring and spacer.





4. Press out front drive sprocket with mainshaft rear bearing and clutch gear together.
5. Remove needle bearing.





6. Remove bearing retainer and then remove snap ring.





7. Press out mainshaft front bearing from mainshaft.

INSPECTION





Gear And Shaft
- Check gears for excessive wear, chips or cracks.
- Check shaft for cracks, wear or bending.
- Check coupling sleeve for wear or damage.

Baulk Ring
- Check baulk ring for cracks or deformation.
- Measure clearance between baulk ring and clutch gear.
Baulk ring to clutch gear clearance:
Standard: 1.0 - 1.5 mm (0.039 - 0.059 inch)
Wear limit: 0.5 mm (0.020 inch)





Bearing
- Make sure bearings roll freely and are free from noise, crack, pitting or wear.





ASSEMBLY
1. Press mainshaft front bearing onto mainshaft. Pay special attention to its direction.

Available Snap Rings For Mainshaft Front Bearing:

2. Install spacer.
3. Select snap ring with proper thickness and install it.
Allowable clearance between snap ring and groove: 0 - 0.15 mm (0 - 0.0059 inch)
Refer to the illustration for available snap ring for mainshaft front bearing.
4. For further procedures, refer to Assembly.