Suzuki Burgman UH125 Service Manual page 76

3-32 ENGINE
PISTON PIN AND PIN BORE
• Measure the piston pin bore diameter using the small bore
gauge.
• If the measurement is out of specification, replace the piston.
% Piston pin bore I.D.:
Service Limit: 16.030 mm
$ 09900-20602: Dial gauge (1/1 000 mm)
09900-22401: Small bore gauge (10 – 18 mm)
• Measure the piston pin outside diameter at three positions
using the micrometer.
• If any of the measurements is out of specification, replace the
piston pin.
% Piston pin O.D.:
Service Limit: 15.980 mm
$ 09900-20205: Micrometer (0 – 25 mm)
PISTON RING-TO-GROOVE CLEARANCE
• Measure the side clearances of the 1st and 2nd piston rings
using the thickness gauge.
• If any of the clearances exceeds the limit, replace both the
piston and piston rings.
$ 09900-20803: Thickness gauge
09900-20205: Micrometer (0 – 25 mm)
% Piston ring-to-groove clearance:
Service Limit (1st) : 0.180 mm
(2nd) : 0.150 mm
% Piston ring groove width:
Standard (1st) : 1.01 – 1.03 mm
(2nd) : 0.81 – 0.83 mm
(Oil) : 1.51 – 1.53 mm
% Piston ring thickness:
Standard (1st) : 0.97 – 0.99 mm
(2nd) : 0.77 – 0.79 mm