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8-5
CYLINDER HEAD/CYLINDER/PISTON
Cylinder Wear Inspection
●
Inspect the cylinder wall for scratches and wear.
·
Inspect the area near T.D.C (Top Dend Center)
carefully. This area is especially subject to wear due
to the possibility of borderline lubrication fro heat
and top ring compression.
●
Measure and record the cylinder I.D. at the three levels
in both an X and Y axis.
●
Take the maximum reading to determine the cylinder
wear.
·
Avoid the intake and exhaust ports when measuring.
●
Measure the piston O.D.
SERVICE LIMIT : 39.05mm
●
Calculate the piston-to-cylinder clearance. Take the
maximum reading to detemine the clearance.
Piston Outer Diameter Inspection
●
Measure and record the piston O.D. 90
。
to the piston
pin bore and at the point specified in the Model
Spectific manual, near the bottom of the piston skirt.
●
Replace the piston if the service limit is exceeded.
SERVICE LIMIT : 38.90mm
●
Calculate the piston-to-cylinder clearance
●
Install the needle bearing and piston pin in the
connecting rod small end and check for excessive play.
●
If the piston pin I.D. is over the service limit, the
crankshaft must be replaced. Measure the I.D. of the
connecting rod small end.
Summary of Contents for A-FOUR -
Page 1: ......
Page 44: ...4 2 LUBRICATION SYSTEM OIL SYSTEM DRAWING ...
Page 51: ...MEMO ...
Page 52: ...FUEL SYSTEM 5 0 FUEL GAUGE FUEL TANK FUEL AUTO COCK STRAINER CARBURETOR ...
Page 62: ...ENGINE REMOVAL INSTALLATION 6 0 ...
Page 97: ...MEMO ...
Page 128: ...BRAKE SYSTEM 12 0 ...
Page 140: ...MEMO ...
Page 150: ...MEMO ...
Page 158: ...MEMO ...
Page 166: ...MEMO ...
Page 174: ...MEMO ...
Page 175: ...17 1 17 WIRING DIAGRAM 17 ...
Page 176: ...MEMO ...
Page 184: ...MEMO ...
Page 185: ...SERVICE MANUAL 2005 6 PRINTED 2005 6 PUBLICATION NO COPY ...