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SERVICE INFORMATION
GENERAL
CYLINDER/PISTON
This section covers service of the cylinder and piston
.
These
services can be peliormed with the engine installed in the
frame.
Take
care
nollo
damage the cylinder wall and
piston.
Be careful not
to damage
the
mating
surfaces when removing the cylinder.
Do
not
tap the
cylinder too hard during removal.
When
disassembling,
mark
and
store the disassembled parts to ensure thai they are
reinstalled
in their original locations.
Clean all disassembled parts with cleaning solvent and dry them by blowing them off with compressed air before
inspection.
SPECIFICATIONS
;
piston
rings,
piston pin
I
.
TORQUE VALUES
ITEM
Cam chain guide roller pin bolt
Cylinder stud bolt
TROUBLESHOOTING
OTY
THREAD
CIA.
(mm)
1
8
4
7
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
•
Bent connecting rod
Compression
t
oo high,
overh
eating or
knocking
•
Excessive carbon built-up on piston head or combustion
chamber
Excessiv
e
smoke
Worn cylinder, piston or piston rings
Improper installation of piston rings
•
Scored or scratched
piston
or cylinder
wall
•
Cy!inder head/valve problem (page 8-5)
Abnormal noise
Worn piston pin or piston pin
hole
Worn cylinder, piston or
piston
rings
•
Worn connecting
rod
small end
TORQUE
REMARKS
N'm
(kgf'm,
IbHt)
10
(1.0,7)
6
(0.6,
4.4)
See page 9-7
9-3
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Table of Contents
Troubleshooting
