Piston - Suzuki VL125 Service Manual

3-34 ENGINE

PISTON

PISTON DIAMETER INSPECTION
Measure the piston outside diameter in the direction perpen-
dicular to the piston pin axis at the height from the skirt as shown
in the illustration using a micrometer.
If the measurement is found less than the service limit, replace
the piston.
# Piston diameter:
Standard: 43.965 – 43.980 mm
Service Limit: 43.880 mm
Piston oversize: 0.5, 1.0 mm
% 09900-20202: Micrometer (25 – 50 mm)
PISTON-TO-CYLINDER CLEARANCE
To determine the piston-to-cylinder clearance, calculate the dif-
ference between the cylinder bore and the piston outside diam-
eter.
# Piston-to-cylinder clearance
Standard: 0.03 – 0.04 mm
Service Limit: 0.120 mm
PISTON PIN BORE
Using a small bore dial gauge, measure the piston pin bore both
in the vertical and horizontal directions.
If the measurement exceeds the service limit, replace the pis-
ton.
# Piston pin bore:
Standard: 12.002 – 12.008 mm
Service Limit: 12.030 mm
% 09900-20605: Dial calipers
PISTON PIN DIAMETER INSPECTION
Using a micrometer, measure the piston pin outside diameter at
three positions, both the ends and the center.
If any of the measurements is found less than the service limit,
replace the pin.
# Piston pin O.D.:
Standard: 11.996 – 12.000 mm
Service Limit: 11.980 mm
% 09900-20205: Micrometer (0 – 25 mm)
10 mm