Yamaha YZF-R7 Owner's Service Manual page 46

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Item
Pistons
Piston-to-cylinder clearance
Diameter D
D
Height H
Piston pin bore (in the piston)
Diameter
Offset
Piston pins
Outside diameter
Piston pin-to-piston pin bore
clearance
Piston rings
Top ring
Ring type
Dimensions (B × T)
End gap (installed)
Ring side clearance
2nd ring
Ring type
Dimensions (B × T)
End gap (installed)
Ring side clearance
ENGINE SPECIFICATIONS
0.028 ~ 0.054 mm (0.0011 ~ 0.0021 in)
71.954 ~ 71.972 mm
(2.8328 ~ 2.8335 in)
H
10 mm (0.39 in)
17.004 ~ 17.015 mm
(0.6694 ~ 0.6699 in)
0 mm (0 in)
16.995 ~ 17.000 mm
(0.6691 ~ 0.6693 in)
0.004 ~ 0.020 mm
(0.00016 ~ 0.00079 in)
B
T
Barrel
0.8 × 2.7 mm (0.031 × 0.106 in)
0.15 ~ 0.25 mm (0.006 ~ 0.010 in)
0.03 ~ 0.07 mm (0.0012 ~ 0.0028 in)
B
T
Taper
0.8 × 2.8 mm (0.031 × 0.110 in)
0.25 ~ 0.35 mm (0.009 ~ 0.014 in)
0.02 ~ 0.06 mm (0.0008 ~ 0.0024 in)
2 - 8
SPEC
Standard Limit
0.1 mm
(0.004 in)
----
----
17.045 mm
(0.6711 in)
----
16.975 mm
(0.6683 in)
0.070 mm
(0.0028 in)
----
----
0.50 mm
(0.020 in)
0.12 mm
(0.0047 in)
----
----
0.70 mm
(0.028 in)
0.12 mm
(0.0047 in)