2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 117Get this manual
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SECONDARY SHEAVE
ASSEMBLY 1 Install: Stopper Sliding sheave Screw (stopper): Nm (0.7 mSkg, 5.1 ftSlb)
2 Install: Fixed sheave Bolts (along with the shims) Bolt: 10 Nm (1.0 mSkg, 7.2