After cutting the valve seat, apply lapping compound to
the valve face, and insert the valve with a valve guide
reamer.
NOTE
Do not excessively press and turn the valve to set it as it
may cause damage. Gently strike and set the valve.
The seat surface may become worn on one side if the
valve is set in the same position. Turn the valve slightly
when setting it.
Take precautions not to allow compound to get into the
clearance between the stem and guide while the valve
is being set.
IN,EX VALVE
Install new stem seals.
NOTE
Replace the stem seals with new ones whenever a stem
seal is removed.
Lubricate each valve stem with molybdenum disulfide
grease and insert the valve into the valve guide.
CAUTION
Turning a valve too fast can damage the stem seals.
Install the spring seats, valve springs and retainers.
NOTE
For valve spring with varying pitch, install the valve
springs with the narrow pitch end facing down.
Compress the valve springs with the valve spring
compressor and install the valve cotters.
CAUTION
Compressing the valve spring more than necessary
when installing the valve cotters may cause loss of
valve spring tension.
TOOL : VALVE SPRING COMPRESSOR
9-11
CYLINDER HEAD / VALVES
Summary of Contents for BESBI SC125 -
Page 1: ......
Page 36: ...MEMO...
Page 56: ...MEMO...
Page 60: ...7 0 LH CRANKCASECOVER KICKSTARTER CONTINUOUSLYVARIABLE TRANSMISSION...
Page 77: ...MEMO...
Page 78: ...8 0 A C GENERATOR STARTER CLUTCH...
Page 87: ...MEMO...
Page 88: ...9 0 CYLINDER HEAD VALVES...
Page 104: ...10 0 CYLINDER PISTON...
Page 111: ...MEMO...
Page 112: ...11 0 TRANSMISSION CRANKSHAFT CRANK CASE...
Page 123: ...MEMO...
Page 124: ...MEMO...
Page 136: ...MEMO...
Page 144: ...MEMO...
Page 164: ...MEMO...
Page 178: ...MEMO...
Page 184: ...MEMO...
Page 185: ...20 WIRING DIAGRAM G Gr B G O Lb Lb I GNI TI ON SWI TCH G O COMBI MERER ASS Y...
Page 186: ...I GNI TI ON SWI T CH FUEL UNI T ENGI NE STOP SWI T CH PASS...
Page 187: ...SERVICEMANUAL 2007 09 PRINTED 2007 09 PUBLICATION...
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