Suzuki GA413 Service Manual page 360

6A-54 ENGINE MECHANICAL
5) Remove cap and using a scale on gaging plastic envelope,
6) If clearance can not be brought to within its limit even by using
1. Gaging plastic
2. Scale
ASSEMBLY
NOTE:
Two sizes of piston are available as standard size spare part
so as to ensure proper piston-to-cylinder clearance. When
installing a standard size piston, make sure to match piston
with cylinder as follows.
a) Each piston has stamped number 1 or 2 as shown. It represents
outer diameter of piston.
b) There are also stamped numbers of 1 and 2 on the cylinder
block as shown. The first number represents inner diameter of
No.1 cylinder, the second number of No.2 cylinder, the third
number of No.3 cylinder and the fourth number of No.4 cylinder.
measure gaging plastic width at the widest point (clearance).
If clearance exceeds its limit, use a new standard size bear-
ing and remeasure clearance.
Item
Bearing
clearance (0.0008 – 0.0019 in.)
a new standard size bearing, replace crankshaft or regrind
crankpin to undersize as follows.
– Install 0.25 mm undersize bearing to connecting rod big
end.
– Measure bore diameter of connecting rod big end.
– Regrind crankpin to following finished diameter.
Finished Measured big end
=
crankpin bore dia. (including
dia. undersize bearing)
– Confirm that bearing clearance is within above standard
value.
Standard
0.020 – 0.050 mm
0.035 mm
–
(0.0014 in.)
Limit
0.080 mm
(0.0031 in.)