2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 188Get this manual
A.CMAGNETO AND STARTER CLUTCH REMOVAL 1Remove: A.Cmagneto rotor bolt Washer
NOTE: While holding the A.Cmagneto rotor with the sheave holderloosen the magneto rotor boltS Do not allow the sheave holder to touch the projection on the A.Cmagneto rotorSheave holder: 90890-01701, YS-01880