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POWR
PISTONS
4. Calculate:
Piston-to-cylinder clearance
Out of specification → Replace the
piston, piston rings and cylinder as a
set.
PISTON
CLEARANCE
Piston-to-cylinder clearance:
0.100–0.105 mm
(0.0039–0.0041 in)
Cylinder and piston combination
Select the appropriate piston to match the
cylinder size by the table as follows.
Cylinder size
indication a
0–5
6–10
11–15
16–18
NOTE:
New cylinder bore size = 80.000 + a/1,000
Example: a = 12 → 80.012 mm.
Piston ring inspection
1. Measure:
Side clearance
(with a thickness gauge 1)
Out of specification → Replace the
piston and piston rings as a set.
Side clearance:
0.03–0.05 mm (0.001–0.002 in)
5-32
CYLINDER
PISTON
=
–
BORE
DIAMETER
Piston color mark
Red
Orange
Green
Purple
E
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