2005 Polaris Sportsman 400/500 Service Manual, Page 76Get this manual
3Loosen three camshaft sprocket bolts
7Slide camshaft inward to allow removal of cam sprocket and remove sprocket from camshaft and chain8Secure cam chain with wire to prevent it from falling into the crankcase
Sprocket Teeth
4Remove camshaft end cap and O-Ring
Inspect for Areas of Tooth Wear or Damage 9Inspect cam sprocket teeth for wear or damageReplace if necessaryDecompressor Shaft