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20 SV1000K3
CY PISTON RING
Unit: mm (in)
ITEM
STANDARD
LIMIT
Cam drive idle gear/sprocket
thrust clearance
0.15 – 0.29
(0.006 – 0.011)
—
Cylinder head distortion
—
0.05
(0.002)
ITEM
STANDARD
LIMIT
Compression pressure
(Automatic de-comp. actuated)
1 000 – 1 400 kPa
(10 – 14 kgf/cm
2
, 142 – 199 psi)
800 kPa
(8 kgf/cm
2
,
114 psi)
Compression pressure differ-
ence
—
200 kPa
(2 kgf/cm
2
,
28 psi)
Piston to cylinder clearance
0.015 – 0.025
(0.0006 – 0.0010)
0.12
(0.0047)
Cylinder bore
98.000 – 98.015
(3.8583 – 3.8589)
Nicks or
Scratches
Piston diam.
97.980 – 97.995
(3.8575 – 3.8581)
Measure at 10 mm (0.4 in) from the skirt end.
97.880
(3.8535)
Cylinder distortion
—
0.05
(0.002)
Piston ring free end gap
1st
Approx. 8.8 (0.35)
7.0
(0.28)
2nd
Approx. 10.1 (0.40)
8.1
(0.32)
Piston ring end gap
1st
0.15 – 0.35
(0.006 – 0.014)
0.7
(0.03)
2nd
0.30 – 0.45
(0.012 – 0.018)
0.7
(0.03)
Piston ring to groove clearance
1st
—
0.18
(0.0071)
2nd
—
0.15
(0.0059)
Piston ring groove width
1st
0.93 – 0.95
(0.0366 – 0.0374)
—
1.55 – 1.57
(0.0610 – 0.0618)
—
2nd
1.01 – 1.03
(0.0398 – 0.0406)
—
Oil
2.51 – 2.53
(0.0988 – 0.0996)
—
Piston ring thickness
1st
0.86 – 0.91
(0.034 – 0.036)
—
1.38 – 1.40
(0.054 – 0.055)
—
2nd
0.97 – 0.99
(0.038 – 0.039)
—
Piston pin bore I.D.
22.002 – 22.008
(0.8662 – 0.8665)
22.030
(0.8673)
Piston pin
O.D.
21.993 – 22.000
(0.8658 – 0.8661)
21.980
(0.8654)