Yamaha YZFR6X(C) 2008 Service Manual page 36

Valve stem runout
Cylinder head valve seat width (intake)
Limit
Cylinder head valve seat width (exhaust)
Limit
Valve spring
Free length (intake)
Limit
Free length (exhaust)
Limit
Installed length (intake)
Installed length (exhaust)
Spring rate K1 (intake)
Spring rate K2 (intake)
Spring rate K1 (exhaust)
Spring rate K2 (exhaust)
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
D
0.040 mm (0.0016 in)
0.90–1.10 mm (0.0354–0.0433 in)
1.6 mm (0.06 in)
1.10–1.30 mm (0.0433–0.0512 in)
1.8 mm (0.07 in)
37.47 mm (1.48 in)
35.60 mm (1.40 in)
37.67 mm (1.48 in)
35.79 mm (1.42 in)
32.80 mm (1.29 in)
32.80 mm (1.29 in)
38.11 N/mm (217.61 lb/in) (3.89 kgf/mm)
52.40 N/mm (299.20 lb/in) (5.34 kgf/mm)
36.36 N/mm (207.62 lb/in) (3.71 kgf/mm)
53.40 N/mm (304.91 lb/in) (5.45 kgf/mm)
166.00–190.00 N (37.32–42.71 lbf) (16.93–
19.37 kgf)
165.00–189.00 N (37.09–42.49 lbf) (16.83–
19.27 kgf)
2.5°/1.6 mm
2.5°/1.6 mm
Clockwise
Clockwise
67.000–67.010 mm (2.6378–2.6382 in)
0.050 mm (0.0020 in)
0.050 mm (0.0020 in)
0.010–0.035 mm (0.0004–0.0014 in)
0.05 mm (0.0022 in)
66.975–66.990 mm (2.6368–2.6374 in)
10.0 mm (0.39 in)
H
2-5
ENGINE SPECIFICATIONS