
Cylinder head
distortion
Service limit
0.05 mm (0.002 in)
(B.T.D.C)
Intake open
(T.D.C)
(A.T.D.C)
Exhaust close
(B.B.D.C)
Exhaust open
(A.B.D.C)
Intake close
19
32
38
57
(B.D.C)
Valve timing diagram
Valve head thickness
Service limit
0.5 mm (0.02 in)
Valve stem runout
Service limit
0.05 mm (0.002 in)
3-19 ENGINE
ENGINE COMPONENT INSPEC-
TION AND SERVICE
Thickness gauge : 09900-20806
Vernier calipers : 09900-20101
VALVE FACE WEAR
Visually inspect each valve face for wear. Replace any
valve with an abnormally worn face. The thickness of
the valve face decreases as the face wears. Measure
the valve head
. If it is out of specification, replace the
valve with a new one.
VALVE STEM RUNOUT
Check the valve stem for abnormal wear or bend.
Place the valve on V-blocks and measure runout.
If the service limit is exceeded or abnormal condition
exists, replace the valve.
Dial gauge : 09900-20606
Magnetic stand : 09900-20701
V-block : 09900-21304
CYLINDER HEAD DISTORTION
Decarbonate in combustion chamber.
Check the gasketed surface of the cylinder head for dis-
tortion with a straightedage and thickness gauge, taking
a clearance reading at several places as indicated. If the
largest reading at any position of the straightedge
exceeds the limit, replace the cylinder head.
CAUTION
Be sure to identify each removed part as to its loca-
tion, and lay the parts out in groups designated as
Front cylinder , Rear cylinder , Exhaust ,
Intake , so that each will be restored to the origi-
nal location during assembly.
Содержание 2002 Comet 125
Страница 1: ...SERVICE MANUAL 99000 94710 SERVICE MANUAL HYOSUNG MOTORS MACHINERY INC ...
Страница 5: ...NOTE Difference between photographs and actual motorcycles depends on the markets ...
Страница 13: ...EXTERIOR ILLUSTRATION 1 7 GENERAL INFORMATION ...
Страница 96: ...CARBURETOR FUEL SYSTEM 4 4 ...
Страница 104: ...Regulator Rectifier Ignition coil NO 1 NO 2 Magneto Gear position switch Fuse Fuel pump relay ELECTRICAL SYSTEM 5 2 ...
Страница 118: ...LAMP HEADLAMP TURN SIGNAL LAMP TAIL BRAKE LAMP Front Rear ELECTRICAL SYSTEM 5 16 ...
Страница 138: ...FRONT FORK CHASSIS 6 14 ...
Страница 144: ...FRONT FORK CHASSIS 6 20 ...