10-4
CYLINDER / PISTON
1
2
3
Insert the piston ring into the top of the cylinder
squarely, using the piston.
Measure the end gap using a feeler gauge. Replace the
ring if the service limit is exceeded.
NOTE
Always replace piston ring as a set.
SERVICE LIMIT : TOP / SECOND : 0.50 mm
OIL RING (SIDE RAIL) : 1.10 mm
TOOL : FEELER GAUGE
Measure and record the piston outer diameter 90 to the
piston pin bore and at the point specified (10mm), near
the bottom of the piston skirt.
Replace the piston if the service limit is exceeded.
SERVICE LIMIT : 52.30 mm
PISTON PIN INSPECTION
Measure the piston pin bore inner diameter in an X and
Y axis. Take the maximum reading to determine the
inner diameter.
Replace the piston if the inner diameter is over the
service limit.
SERVICE LIMIT : 15.04 mm
Measure the piston pin outer diameter at three points.
Replace the piston pin if the service limit is exceeded.
SERVICE LIMIT : 14.960 mm
Calculate the piston pin-to-pin bore clearance by
subtracting the piston pin outer diameter from the pin
bore inner diameter.
SERVICE LIMIT : 0.020 mm
SMALL END BEARING SURFACE INSPECTION
Measure the inner dismeter of the connecting rod small
end.
SERVICE LIMIT : 15.037 mm
Calculate the connecting rod small end-to-piston pin
clearance.
SERVICE LIMIT : 0.02 mm
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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