Suzuki WagonR+ RB310 Service Manual page 1913

1. 50 mm (1.96 in.)
2. 95 mm (3.74 in.)
INSPECTION
Cylinders
D Inspect cylinder walls for scratches, roughness, or ridges which
indicate excessive wear. If cylinder bore is very rough or deeply
scratched, or ridged, rebore cylinder and use oversize piston.
D Using a cylinder gauge, measure cylinder bore in thrust and axial
directions at two positions as shown in figure.
If any of following conditions is noted, rebore cylinder.
1) Cylinder bore dia. exceeds limit.
2) Difference of measurements at two positions exceeds taper
limit.
3) Difference between thrust and axial measurements exceeds
out-of-round limit.
Cylinder bore dia. limit: 74.15 mm (2.9193 in.)
Tapper and out-of-round limit: 0.10 mm (0.0039 in.)
NOTE:
If any one of three cylinders has to be rebored, rebore all
three to the same next oversize. This is necessary for the
sake of uniformity and balance.
Pistons
D Inspect piston for faults, cracks or other damaged.
Damaged or faulty piston should be replaced.
D Piston diameter:
As indicated in figure, piston diameter should be measured at a
position 23 mm (0.91 in.) from piston skirt end in the direction per-
pendicular to piston pin.
Piston
diameter
1. 23 mm (0.91 in.)
ENGINE MECHANICAL 6A-51
73.970 – 73.990 mm
Standard
(2.9122 – 2.9130 in.)
Oversize:
74.220 – 74.230 mm
0.25 mm
(2.9220 – 2.9224 in.)
(0.0098 in.)
0.50 mm 74.470 – 74.480 mm
(0.0196 in.) (2.9319 – 2.9323 in.)