Suzuki kq750 2008, Service Manual

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Engine Mechanical: 1D-44
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
exceed the limit, replace both the piston and piston
rings.
Special tool
(A): 09900–20803 (Thickness gauge)
(B): 09900–20205 (Micrometer (0 – 25 mm))
Piston ring-to-groove clearance
Service limit: (1st): 0.180 mm (0.0071 in)
Service limit: (2nd): 0.150 mm (0.0059 in)
Piston ring groove width
“a”: Standard: (1st): 0.83 – 0.85 mm (0.0327 – 0.0335
in)
“b”: Standard: (1st): 1.30 – 1.32 mm (0.0512 – 0.0520
in)
Standard: (2nd): 1.01 – 1.03 mm (0.0398 – 0.0406 in)
Standard: (Oil): 2.01 – 2.03 mm (0.0791 – 0.0799 in)
Piston ring thickness
Standard: (1st):0.76 – 0.81 mm (0.0299 – 0.0319)
Standard: (1st):1.08 – 1.10 mm (0.0425 – 0.0433)
Standard: (2nd): 0.97 – 0.99 mm (0.0382 – 0.0390 in)
Piston Ring Free End Gap and Piston Ring End Gap
Measure the piston ring free end gap using vernier
calipers. Next, fit the piston ring squarely into the
cylinder and measure the piston ring end gap using the
thickness gauge. If any of the measurements exceed the
service limit, replace the piston ring with a new one.
Special tool
(A): 09900–20101 (Vernier calipers (1/15 mm,
150 mm))
Piston ring free end gap
Service limit: (1st): 10.5 mm (0.41 in)
Service limit: (2nd): 11.7 mm (0.46 in)
Special tool
(B): 09900–20803 (Thickness gauge)
Piston ring end gap
Service limit: (1st): 0.50 mm (0.020 in)
Service limit: (2nd): 0.50 mm (0.020 in)
(A)
I831G1140183-03
“ a ”
“ b ”
I831G1140336-01
(B)
I649G1140264-03
(A)
I649G1140265-03
(B)
I831G1140184-02