Yamaha YZF-R7 Owner's Service Manual page 46

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
0.15 ~ 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
0.25 ~ 0.35 mm (0.009 ~ 0.014 in)
0.02 ~ 0.06 mm (0.0008 ~ 0.0024 in)
2 - 8
Standard
0.106 in)
0.110 in)
SPEC
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)