ENGINE 3-35
0.5 mm O.S.
1.0 mm O.S.
Paint
Oil ring spacer
Oversize piston ring
The following two types of oversize piston rings are used. They
bear the following identification numbers.
SIZE 1st 2nd
0.5 mm O.S. 50 50
1.0 mm O.S. 100 100
Oversize oil ring
The following two types of oversize oil rings are available as op-
tional parts. They bear the following identification marks.
SIZE COLOR
STD NIL
0.5 mm O.S. Painted Red
1.0 mm O.S. Painted Yellow
Oversize side rail
Just measure outside diameter to identify the side rail as there is
no mark or numbers on it.
PISTON PIN AND PIN BORE
Using a small bore gauge, measure the piston pin bore inside
diameter, and using a micrometer, measure the piston pin out-
side diameter. If the reading exceeds following limit, replace both
piston and piston pin.
" Piston pin bore I.D.
Service Limit: 20.030 mm (0.7886 in)
% 09900-20602: Dial gauge (1/1000 mm, 1 mm)
09900-22403: Small bore gauge (18 – 35 mm)
Using a micrometer, measure the piston pin outside diameter at
three positions.
" Piston pin O.D.
Service Limit: 19.980 mm (0.7866 in)
% 09900-20205: Micrometer (0 – 25 mm)
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