Suzuki LT-A400, Service Manual

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Engine Mechanical: 1D-33
Piston Ring-to-groove Clearance
Using the thickness gauge, measure the side clearances
of the 1st and 2nd piston rings. If any of the clearances
exceeds the limit, replace both piston and piston rings.
Special tool
: 09900–20803 (Thickness gauge)
: 09900–20205 (Micrometer (0 – 25 mm))
Piston ring-to-groove clearance
Service limit: (1st): 0.18 mm (0.0071 in)
Service limit: (2nd): 0.15 mm (0.0059 in)
Piston ring groove width
Standard: (1st): 1.01 – 1.03 mm (0.0398 – 0.0406 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): 0.97 – 0.99 mm (0.0382 – 0.0390 in)
Standard: (2nd): 0.97 – 0.99 mm (0.0382 – 0.0390 in)
Piston Ring Free End Gap and Piston Ring End Gap
Before installing piston rings, measure the free end gap
of each ring using vernier calipers. Next, fit the ring in the
cylinder, and measure each ring end gap using a
thickness gauge. If any ring has an excess end gap,
replace the ring.
Special tool
: 09900–20101 (Vernier calipers (1/15 mm, 150
mm))
: 09900–20803 (Thickness gauge)
Piston ring free end gap
Service limit: (1st): 7.1 mm (0.28 in)
Service limit: (2nd): 8.3 mm (0.33 in)
Piston ring end gap
Service limit: (1st): 0.50 mm (0.020 in)
Service limit: (2nd): 0.50 mm (0.020 in)
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