Yamaha YFM25BX Owner's Manual page 104

1. Final gear oil drain bolt
5. Install the drain bolt, and then tighten it to the
specified torque.
8
Tightening torque:
Final gear oil drain bolt:
23 Nm (2.3 m·kgf, 17 ft·lbf)
6. Add the recommended final gear oil to the
brim of the filler hole as shown.
1. Final gear oil
2. Correct oil level
3. Final gear oil filler bolt
Recommended final gear oil:
See page 10-1.
ECB00420
CAUTION:
Be sure no foreign material enters the final
gear case.
7. Install the oil filler bolt, and then tighten it to the
specified torque.
8-17