3-7
3
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 con-
necting 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
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
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.
AT THIS POINT
To service cylinder, see Servicing Top-Side Compo-
nents sub-section.
CAUTION
When removing the cylinder, be sure to support the
piston 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 Compo-
nents sub-section.
AT THIS POINT
To service center crankcase components only, pro-
ceed to Removing Left-Side Components.
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