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– 5. Tighten the clutch and gearbox housings with several 8 mm and 10 mm bolts.

– 6. Tap the mainshaft with a plastic hammer.

1. Mainshaft
2. Gearbox housing
3. Mainshaft base

– 7. Slide the mainshaft base over the mainshaft.

1. Mainshaft holder bolt
2. Hex bolts

– 8. Attach the mainshaft holder to the mainshaft as follows:

• Back-out the mainshaft holder bolt and loosen the two hex bolts.
• Fit the holder over the mainshaft so its lip is towards the gearbox.
• Align the mainshaft holder's lip around the groove at the inside of the mainshaft splines, then tighten the hex bolts.

A Dial gauge

– 9. Seat the mainshaft fully by tapping its end with a plastic hammer.

– 10. Thread the mainshaft holder bolt in until it just contacts the wide surface of the mainshaft base.

– 11. Zero a dial gauge on the end of the mainshaft.

– 12. Turn the mainshaft holder bolt clockwise; stop turning when the dial gauge has reached its maximum movement. The reading on the dial gauge is the amount of mainshaft end play.

CAUTION: Turning the mainshaft holder bolt more than 60 degrees after the needle of the dial gauge stops moving may damage the gearbox.

– 13. If the reading is within the standard, the clearance is correct.

If the reading is not within the standard, recheck the thrust shim thickness.

Standard: 0.10 – 0.16 mm