Arctic Cat 500 Service Manual page 143

3. Rotate the valve in the V blocks.
4. Maximum runout must not exceed specifications.
Measuring Valve Guide/Valve Stem
Deflection (Wobble Method)
1. Mount a dial indicator and base on the surface plate;
then place the cylinder head on the surface plate.
2. Install the valve into the cylinder head; then position
the dial indicator contact point against the outside
edge of the valve face. Zero the indicator.
3. Push the valve from side to side; then from top to
bottom.
4. Maximum "wobble" deflection must not exceed
specifications.
Measuring Valve Guide
(Inside Diameter)
1. Insert a suitable bore gauge 1/2 way into each valve
guide bore and record the measurement.
2. Acceptable inside diameter range must be within
specifications.
3. If a valve guide is out of tolerance, it must be
replaced.
Servicing Valves/Valve Guides/Valve
Seats
If valves, valve guides, or valve seats require servicing or
replacement, Arctic Cat recommends the components be
taken to a qualified machine shop for servicing.
If valves are discolored or pitted or if the seating sur-
face is worn, the valve must be replaced. Do not attempt
to grind the valves or severe engine damage may occur.
Measuring Rocker Arm
(Inside Diameter)
ATV1082A
1. Using a dial calipers, measure the inside diameter of
the rocker arm.
2. Acceptable inside diameter range must be within
specifications.
Measuring Rocker Arm Shaft
(Outside Diameter)
1. Using a micrometer, measure the outside diameter of
the rocker arm shaft.
2. Acceptable outside diameter must be at or above
specifications.
Installing Valves
1. Apply grease to the inside surface of the valve seals;
then place a lower spring seat and valve guide seal
over each valve guide.
CC131D
2. Insert each valve into its original location.
3. Install the valve springs with the painted end of the
spring facing away from the cylinder head.
 NOTE: If the paint is not visible, install the ends of the
springs with the closest wound coils toward the head.
CAUTION
CC144D
141