Servicing Top-Side Components - Arctic Cat 2016 Wildcat Sport Service Manual

ROV1-044
17. Repeat step 16 for the other piston.
AT THIS POINT

To service center crankcase components only, proceed
to Removing Left-Side Components.
Servicing Top-Side
Components
MEASURING VALVE/TAPPET
CLEARANCE
1. Rotate the engine two full revolutions.
NOTE: Rotating the engine two full revolutions will

ensure that any oil trapped in the tappet/shim is
purged to maintain an accurate clearance reading.
2. Rotate the engine until the camshaft lobe of the valve
being measured is directly away from the tappet.
3. Using an appropriate thickness gauge, measure and
record the intake and exhaust valve clearance of the
cylinder that is on the compression stroke; then
rotate the engine 360° and measure and record the
valve clearance of the other cylinder. Valve clearance
must be within specifications.
Valve Clearance (Cold)
15°-25° C Intake: 0.16 mm (0.006 in.)
(59°-77° F)
Exhaust: 0.22 mm (0.009 in.)
KC534A
50
4. To select the correct replacement shim for an
out-of-specification clearance, note the three-digit
number on the surface of the existing shim; then
refer to the appropriate Tappet Shim Selection Table
(Exhaust or Intake) on the following pages and use
this procedure:
A. Find the Measured Tappet Clearance (from step 3) in
the left-side vertical column of the table.
B. Find the Present Shim Size (three-digit-number) at
the top-side horizontal column of the table.
C. Match the clearance in the vertical column with the
present shim size to obtain the recommended
replacement shim.
Cleaning/Inspecting Valve Cover
 NOTE: If the valve cover cannot be trued, the cylin-
der head assembly must be replaced.
1. Wash the camshaft holder in parts-cleaning solvent.
2. Place the camshaft holder on the Surface Plate cov-
ered with #400 grit wet-or-dry sandpaper. Using light
pressure, move the camshaft holder in a figure 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 assem-
bly by continuing to move the camshaft holder 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 valve
cover.
WT581
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.
VALVE ASSEMBLY
When servicing valve assembly, inspect valve seats,
valve stems, valve faces, and valve stem ends for pits,
burn marks, or other signs of abnormal wear.
 NOTE: Whenever a valve is out of tolerance, it must
be replaced.