Polaris TRAIL BOSS 325 2001 Manual page 75

CAMSHAFT INSPECTION
1. Visually inspect each cam lobe for wear, chafing or
damage.
2. Thoroughly clean the cam shaft, making sure the oil
feed holes are not obstructed.
3. Measure height of each cam lobe using a micrometer.
Compare to specifications.
Cam Lobe Height (Intake & Exhaust):
Std: 1.2955-1.2995I (32.881-32.981 mm)
Limit: 1.2837I (32.581 mm)
4. Measure camshaft journal outside diameter (O.D.)
Camshaft Journal O.D.:
Mag & PTO End: 1.4935-1.4941I
(37.935-37.950 mm)
5. Measure ID of camshaft journal bore.
Camshaft Journal I.D.:
Mag & PTO End: 1.4963-1.4970I
(38.005-38.025 mm)
6. Calculate oil clearance by subtracting journal OD from
journal bore ID. Compare to specifications.
Camshaft Oil Clearance:
Std: .0022-.0035I (.055-.090 mm)
Limit: .0039I (.10 mm)
Replace camshaft if damaged or if any part is worn past the
service limit.
Replace cylinder head if camshaft journal bore is damaged
or worn excessively.
ENGINE
Lubrication holes
Lobe height
Journal O.D.
Journal
3.19