28
C. Cylinder
D. Piston
NOTE: Steps 1-6 in the preceding sub-section must
precede this procedure.
7. Using a needle nose pliers, remove one piston pin
circlip. Take care not to drop it into the crankcase.
KM451
8. Using Piston Pin Puller, remove the piston pin.
Account for the opposite-side circlip. Remove the
piston.
NOTE: It is advisable to remove the opposite-side
circlip prior to using the puller.
NOTE: Support the connecting rod with rubber
bands to avoid damaging the rod or install a connect-
ing rod holder.
NOTE: If the existing rings will not be replaced with
new rings, note the location of each ring for proper
installation. When replacing with new rings, replace
as a complete set only. If the piston rings must be
removed, remove them in this sequence.
A. Starting with the top ring, slide one end of the ring
out of the ring-groove.
B. Remove each ring by working it toward the dome
of the piston while rotating it out of the groove.
Servicing Top-Side
Components
VALVE ASSEMBLY
When servicing valve assembly, inspect valve seats,
valve stems, valve faces, and valve stem ends for pits,
discoloration, or other signs of abnormal wear.
NOTE: Whenever a valve is out of tolerance, it must
be replaced.
Cleaning/Inspecting Camshaft
Holder
1. Remove the rocker arm shafts, rocker arms, and stop
plate from the camshaft holder.
KM708A
2. Inspect the camshaft holder for cracks, distortion, or
galling.
3. Inspect the rocker arm shafts for blue discoloration
or scoring.
4. Inspect the rocker arms for excessive wear, loose
adjusters, or scored camshaft followers.
KM710A
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.
AT THIS POINT
To service cylinder, see Servicing Top-Side Compo-
nents sub-section.
CAUTION
When removing the cylinder, be sure to support the pis-
ton to prevent damage to the crankcase and piston.
CAUTION
Do not allow the connecting rod to go down inside the
crankcase. If the rod is down inside the crankcase and
the crankshaft is rotated, severe damage will result.
AT THIS POINT
To service piston, see Servicing Top-Side Components
sub-section.
AT THIS POINT
To service center crankcase components only, proceed
to Removing Left-Side Components.
