Yamaha R6 2009 Service Manual page 36

Valve guide inside diameter (exhaust)
Limit
Valve-stem-to-valve-guide clearance (intake)
Limit
Valve-stem-to-valve-guide clearance (exhaust)
Limit
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
ENGINE SPECIFICATIONS
4.500–4.512 mm (0.1772–0.1776 in)
4.542 mm (0.1788 in)
0.010–0.037 mm (0.0004–0.0015 in)
0.080 mm (0.0032 in)
0.025–0.052 mm (0.0010–0.0020 in)
0.095 mm (0.0037 in)
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)
2-5