Arctic Cat 500 Service Manual page 51

2. Place the cylinder head cover on the Surface Plate
covered with #400 grit wet-or-dry sandpaper. Using
light pressure, move the cylinder head cover in a fig-
ure eight motion. Inspect the sealing surface for any
indication of high spots. A high spot can be noted by
a bright metallic finish. Correct any high spots
before assembly by continuing to move the cylinder
head cover in a figure eight motion until a uniform
bright metallic finish is attained.
CAUTION
Do not remove an excessive amount of the sealing sur-
face or damage to the camshaft will result. Always
check camshaft clearance when resurfacing the cylin-
der head cover.
CAUTION
Water or parts-cleaning solvent must be used in con-
junction with the wet-or-dry sandpaper or damage to
the sealing surface may result.
Removing Valves
NOTE: Index all valves, springs, and cotters to
their original position when removing. When
installing, all valve
installed in their original position.
1. Using a valve spring compressor, compress the valve
springs and remove the valve keepers. Account for
an upper spring retainer.
2. Remove the valve seal and the lower remaining
spring seat. Discard the valve seal.
CC130D
components should
CC132D
NOTE: The valve seals must be replaced.
3. Remove the valve springs; then invert the cylinder
head and remove the valves.
Measuring Valve Stem Runout
1. Support each valve stem end with the V Blocks; then
check the valve stem runout using a dial indicator.
be
2. Maximum runout must not exceed specifications.
Measuring Valve Stem Outside
Diameter
1. Using a micrometer, measure the valve stem outside
diameter.
2. Acceptable diameter ranges must be within specifi-
cations.
CC134D
CC136D
ATV-1082
49