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SERVICE INFORMATION
GENERAL
•
The cylinder and piston can be serviced with
the
engine installed in the
frame.
•
Take care not to damage
the
cylinder wall and piston.
e
Be
careful not
to
damage the
ma ting
surfaces when removing the cylinder.
CYLINDER/PISTON
• Rocker
arm and valve lubricating oil is
fed
through the oil passage in
the
cylinder. Clean
the
oil passage
before
install-
ing
the
cylinder.
•
When disassembling, mark
and
store the disassembled
parts
to ensu
re
that
they are
reinstalled
in their originalloca-
lions.
SPECIFICATIONS
piston pin,
piston ring
;
g.p
TORQUE VALUE
iI
Cylinder stud bolt
12 N·m
(1.2
kgf-m, 9Ibf.ft)
TROUBLESHOOTING
Compression too
low,
hard
starting or poor performance
at
low
speed
•
Leaking cylinder head gasket
•
Worn, stuck or broken
piston ring
•
Worn or damaged cylinder and piston
Compression too
high.
overheating or knocking
•
Excessive carbon built-up on piston head or combustion chamber
Excessive
smoke
•
Worn
cylinder.
piston
or piston rings
•
Improper installation of piston rings
•
Scored or scratched piston or cylinder wall
Abnormal noise
•
Worn piston pin or piston pin bo re
•
Worn
connecting
rod small end
•
Worn cylinder. piston or piston rings
See
page
H5
9-3
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Table of Contents
Troubleshooting
