Suzuki LT-Z400 - Page 76

3-32 ENGINE
PISTON RING FREE END GAP AND PISTON RING END GAP
Measure the piston ring free end gap using the vernier calipers,
first, and then fit the piston ring squarely into the cylinder and
measure the piston ring end gap using the thickness gauge.
If any measurement exceeds the service limit, replace the piston
ring with a new one.
& 09900-20101: Vernier calipers
% Piston ring free end gap
Service Limit:
1st: 5.5 mm (0.22 in)
2nd: 9.2 mm (0.36 in)
& 09900-20803: Thickness gauge
% Piston ring end gap
Service Limit:
1st: 0.50 mm (0.020 in)
2nd: 0.50 mm (0.020 in)
PISTON PIN AND PIN BORE
Measure the piston pin bore diameter using the small bore
gauge. If the diameter exceeds the service limit, replace the pis-
ton with a new one.
& 09900-20602: Dial gauge (1/1000 mm)
09900-22403: Small bore gauge (18 – 35 mm)
% Piston pin bore
Service Limit: 20.030 mm (0.7886 in)
Measure the piston pin outside diameter at three positions using
the micrometer. If any measurement exceeds the service limit,
replace the piston pin with a new one.
& 09900-20205: Micrometer (0 – 25 mm)
% Piston pin O.D.
Service Limit: 19.980 mm (0.7866 in)