2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 58Get this manual
CAMSHAFT REMOVAL
1Remove cam shaft end plug (A)
Rocker ArmSupport I.D .8669-.8678I (22.020-22.041 mm) 2Remove camshaft sprocket flange bolt and washer
7Measure I.Dof both rocker arm shaft support areas and visually inspect surfaceCompare to specifications
3Place clean shop towel in the area below cam chain sprocket