Suzuki LT-Z50, Service Manual

Page: 64 / 215

ENGINE 3-23
PISTON RING FREE END GAP AND PISTON RING END GAP
Measure the piston ring free end gap with a vernier calipers.
Next, fit the piston ring squarely into the cylinder and measure
the piston ring end gap with a thickness gauge.
If any of the measurements exceeds the service limit, replace
the piston ring with a new one.

Piston ring free end gap:
Service Limit (1st): 3.7 mm (0.15 in)
(2nd): 3.7 mm (0.15 in)

09900-20102: Vernier calipers

Piston ring end gap:
Service Limit (1st): 0.50 mm (0.020 in)
(2nd): 0.50 mm (0.020 in)

09900-20803: Thickness gauge
PISTON PIN AND PIN BORE
Measure the piston pin bore inside diameter with a small bore
gauge.
If the measurement is more than the service limit, replace the
piston.

Piston pin bore I.D.:
Service Limit: 10.030 mm (0.3949 in)

09900-20602: Dial gauge (1/1000 mm, 1 mm)
09900-22401: Small bore gauge (10 – 18 mm)
Measure the piston pin outside diameter at three positions with a
micrometer.
If any of the measurements is less than the service limit, replace
the piston pin.

Piston pin O.D.:
Service Limit: 9.980 mm (0.3929 in)

09900-20205: Micrometer (0 – 25 mm)
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