Suzuki WagonR+ RB310 Service Manual page 1917

1 or 2
A: Crank pulley side
5) Remove cap and using a scale (2) on gaging plastic envelope,
measure gaging plastic (1) width at the widest point (clear-
ance).
If clearance exceeds its limit, use a new standard size bearing
and remeasure clearance.
Item
Bearing
clearance
6) If clearance can not be brought to within its limit even by using
a new standard size bearing, regrind crankpin to undersize
and use 0.25 mm undersize bearing.
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 (1), the second number of No.2 cylinder (2) and the third
number of No.3 cylinder (3).
c) Stamped number on piston and that on cylinder block should
correspond. That is, install number 2 stamped piston to cylinder
which is identified with number 2 and a number 1 piston to cylin-
der with number 1.
Piston
Number
at the
Outer diameter
top
(mark)
73.98 – 73 .99
1
(2.9126 – 2.9130)
73.97 – 73.98
2
(2.9122 – 2.9126)
ENGINE MECHANICAL 6A-55
Standard
0.020 – 0.050 mm
(0.0008 – 0.0019 in.)
Cylinder
Number
Bore diameter
(mark)
74.01 – 74.02
1
(2.9138 – 2.9141)
74.00 – 74.01
2
(2.9134 – 2.9138)
Limit
0.080 mm
(0.0031 in.)
Unit: mm (in.)
Piston-to-
cylinder
clearance
0.02 – 0.04
(0.0008 – (0 0008 –
0.0015)