Yamaha YZFR1W 2007 Service Manual page 33

Installed compression spring force (intake)
Installed compression spring force (exhaust)
Spring tilt (intake)
Spring tilt (exhaust)
Winding direction (intake)
Winding direction (exhaust)
Cylinder
Bore
Taper limit
Out of round limit
Piston
Piston-to-cylinder clearance
Limit
Diameter D
Height H
Offset
Offset direction
Piston pin bore inside diameter
Piston pin outside diameter
Piston ring
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
171–197 N (38.44–44.29 lbf) (17.44–20.09
kgf) at 35.50 mm (1.398 in)
202–232 N (45.41–52.15 lbf) (20.60–23.66
kgf) at 33.00 mm (1.299 in)
2.5 °/1.7 mm
2.5 °/1.7 mm
Clockwise
Clockwise
77.000–77.010 mm (3.0315–3.0319 in)
0.050 mm (0.0020 in)
0.050 mm (0.0020 in)
0.010–0.035 mm (0.0004–0.0014 in)
0.12 mm (0.0047 in)
76.975–76.990 mm (3.0305–3.0311 in)
12.0 mm (0.47 in)
0.50 mm (0.0197 in)
Intake side
17.002–17.013 mm (0.6694–0.6698 in)
16.991–17.000 mm (0.6689–0.6693 in)
Barrel
0.90 × 2.75 mm (0.04 × 0.11 in)
0.15–0.25 mm (0.0059–0.0098 in)
0.030–0.065 mm (0.0012–0.0026 in)
Taper
0.80 × 2.75 mm (0.03 × 0.11 in)
0.30–0.45 mm (0.0118–0.0177 in)
0.020–0.055 mm (0.0008–0.0022 in)
2-5