1. If removed, check the transmission oil tube for blockages and contamination. Carefully fit new O-rings to the transmission oil tube and insert the tube into the crankcase, ensuring the tag on the tube locates in the slot in the crankcase.
2. Locate the input shaft to the upper crankcase, installing it through the aperture for the bearing housing.
3. Align the fixing holes to the threaded holes in their crankcase and fit the bearing housing into the aperture, by hand, as deeply as possible.
4. Using the old fixings, evenly and progressively tighten them to draw the bearing housing into the upper crankcase until fully home as noted for removal. Remove and discard the fixings.



Bearing housing Fixings M6 threaded holes Transmission oil tube

5. Install new fixings to the bearing housing and tighten to 12 Nm.
6. Refit the selectors and shafts (see Selector Forks and Drum - Installation).
7. Refit the output shaft to the crankcase ensuring the snap-ring locates in the corresponding groove in the crankcase, and the dowel locates in the slot in the upper crankcase.
8. Ensure the output shaft seal aligns with its recess in the crankcase.



Groove in crankcase Snap ring Dowel Seal

9. Ensure the hole in the output shaft needle roller bearing outer race is positioned to locate onto the dowel provided in the upper crankcase.



Roller bearing Dowel

Perform the following operations

Perform the following operations:

Crankcases - Assembly L Series

• Crankcases - Assembly

Engine - Install - L Series

• Engine - Installation