Arctic Cat 400 Service Manual page 197

! CAUTION
Do not remove an excessive amount of the sealing
surface or damage to the camshaft will result.
Always check camshaft clearance when resurfacing
the valve cover.
! CAUTION
Water or parts-cleaning solvent must be used in
conjunction with the wet-or-dry sandpaper or dam-
age to the sealing surface may result.
Removing Valves
NOTE: Keep all valves and valve components as
a set. Note the original location of each valve set
for use during installation. Return each valve set to
its original location during installation.
1. Using a valve spring compressor, compress the
valve springs and remove the valve cotters.
Account for an upper spring retainer.
2. Remove the valve seal and the lower remaining
spring seat. Discard the valve seal.
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NOTE: The valve seals must be replaced.
3. Remove the valve springs; then invert the cylin-
der head and remove the valves.
Measuring Valve Stem Runout
1. Support each valve stem end with the V Blocks
(p/n 0644-022); then check the valve stem
runout using a dial indicator.
2. Maximum runout must not exceed specifica-
tions.
Measuring Valve Stem
Outside Diameter
1. Using a micrometer, measure the valve stem
outside diameter.
2. Acceptable diameter range (intake valve) must
be within specifications.
3. Acceptable diameter range (exhaust valve) must
be within specifications.
Measuring Valve Face/Seat Width
1. Using a micrometer, measure the width of the
valve face.
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