2008 Yamaha Snowmobiles FX NYTRO Factory Service Manual, Page 131Get this manual

2008 Yamaha Snowmobiles FX NYTRO Factory Service Manual, Page 131

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SECONDARY SHEAVE
For example, if the clearance is 36 mm (1.42 in), install 0.5 mm (0.02 in) shim on each bolt so the clearance is 35.5 mm (1.40 in)4 Adjust: Secondary sheave clearance