Arctic Cat DVX 400 2004, Service Manual

Page: 45 / 153

16
ATV-1004
2. Acceptable width range must be within specifica-
tions.
Measuring Valve Face Radial Runout
1. Mount a dial indicator on the surface plate; then
place the valve stem on a set of V blocks.
2. Position the dial indicator contact point on the out-
side edge of the valve face; then zero the indicator.
ATV1082A
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.
CC131D
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 snap gauge 1/2 way down into each valve
guide bore; then remove the gauge and measure it
with a micrometer.
2. Acceptable inside diameter range must be within
specifications.
3. If a valve guide is out of tolerance, it must be
replaced.
Replacing Valve Guide

NOTE: If a valve guide is worn or damaged, it
must be replaced.
1. If a valve guide needs replacing, insert a valve guide
remover into the valve seat side of the valve guide.
Using a hammer, gently drive the valve guide out of
the cylinder head.
CC137D
2. Using an appropriate valve guide reamer, remove
any burrs or tight areas from the valve guide jour-
nals.
CC142D
3. To install a valve guide, use a valve guide installer
and gently drive a valve guide with a retaining clip
into the bore from the valve spring side until the
retaining clip just contacts the cylinder head.
T