2005 Polaris Sportsman 400/500 Service Manual, Page 78Get this manual
Camshaft Oil Clearance: Std: .0022-.0035I (.055-.090 mm) Limit: .0039I (.10 mm) Lubrication holes Lobe height NOTE: Replace camshaft if damaged or if any part is worn past the service limitNOTE: Replace cylinder head if camshaft journal bore is damaged or worn excessively
Cam Lobe Height (IntakeExhaust): Std: 1.2884-1.2924I (32.726-32.826 mm) Limit: 1.2766I (32.426 mm) 3Measure height of each cam lobe using micrometerCompare to specificationsJournal O.D
CYLINDER HEAD EXPLODED VIEW, EH50PL
1Remove the two 6mm flange bolts (A) from cylinder headSee next exploded view on next page2Loosen each of the four cylinder head bolts evenly 18 turn each time in criss-cross pattern until looseB