ENGINE
4-71
IMPORTANT: Clean the Cylinder After Honing
It is very important that the cylinder be thoroughly cleaned
after honing to remove all grit material. Wash the cylinder in a
solvent, then in hot, soapy water. Use electrical contact cleaner
if necessary to clean these areas. Rinse thoroughly, dry with
compressed air, and oil the bore immediately with 4 Cycle
Lubricant to prevent the formation of surface rust. If cylinder
wears or damage is excessive, it will be necessary to replace
the cylinder. Hone only enough to deglaze the outer layer of
the cylinder bore.
PISTON INSPECTION
1. Measure piston outside diameter at a point 7mm up from the
bottom of the piston at a right angle to the direction of the
piston pin.
2. Subtract this measurement from the maximum cylinder
measurement obtained earlier.
Piston to Cylinder Clearance
Std: 0.02-0.05 mm
Limit: 0.1 mm
3. Measure piston pin bore. Replace piston if out--of--round
4. Measure piston pin O.D. Replace piston pin if
out--of--round.
5. Measure connecting rod small end ID. Replace crankshaft if
out--of--round.
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General