2009 Yamaha Grizzly Service Manual, Page 106Get this manual

2009 Yamaha Grizzly Service Manual, Page 106

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CHASSIST Final gear oil drain bolt 23 Nm (2.3 mkg, 17 ftlb)
4 Remove: Final gear oil level check bolt Final gear oil drain bolt "1" Completely drain the final drive case of its oil
5 Check