Arctic Cat 400 Service Manual page 83

Measuring Camshaft Runout
NOTE: If the camshaft is out of tolerance, it must
be replaced.
1. Place the camshaft on a set of V blocks; then
position the dial indicator contact point against
the shaft and zero the indicator.
2. Rotate the camshaft and note runout; maximum
tolerance must not exceed specifications.
Measuring Camshaft Lobe Height
1. Using a calipers, measure each cam lobe height.
2. The lobe heights must not exceed minimum
specifications.
Back
CC127D
CC283D
ATV1013A
Back to TOC
Inspecting Camshaft Bearing
Journal
1. Inspect the bearing journal for scoring, seizure
marks, or pitting.
2. If excessive scoring, seizure marks, or pitting is
found, the cylinder head assembly must be
replaced.
Measuring Camshaft to
Cylinder Head Clearance
1. Remove the adjuster screws and jam nuts.
2. Place a strip of plasti-gauge in each of the cam-
shaft lands in the cylinder head.
3. Place the valve cover on the cylinder head and
secure with the valve cover cap screws. Tighten
securely.
NOTE: Do not rotate the camshaft when measur-
ing clearance.
4. Remove the cap screws securing the valve cover
to the cylinder; then remove the valve cover and
camshaft.
5. Match the width of the plasti-gauge with the
chart found on the plasti-gauge packaging to
determine camshaft to cylinder head and valve
cover clearance.
Back to Section TOC
3
CC005D
MD1261
Next
3-39