Yamaha 2006 YZFR6V, Service Manual

Page: 36 / 444

ENGINE SPECIFICATIONS
2-5
Valve margin thickness D (intake) 0.90–1.10 mm (0.0354–0.0433 in)
Limit 0.8 mm (0.03 in)
Valve margin thickness D (exhaust) 1.10–1.30 mm (0.0433–0.0512 in)
Limit 1.0 mm (0.04 in)
Valve stem diameter (intake) 4.475–4.490 mm (0.1762–0.1768 in)
Limit 4.460 mm (0.1756 in)
Valve stem diameter (exhaust) 4.460–4.475 mm (0.1756–0.1762 in)
Limit 4.445 mm (0.1750 in)
Valve guide inside diameter (intake) 4.500–4.512 mm (0.1772–0.1776 in)
Limit 4.542 mm (0.1788 in)
Valve guide inside diameter (exhaust) 4.500–4.512 mm (0.1772–0.1776 in)
Limit 4.542 mm (0.1788 in)
Valve-stem-to-valve-guide clearance (intake) 0.010–0.037 mm (0.0004–0.0015 in)
Limit 0.080 mm (0.0032 in)
Valve-stem-to-valve-guide clearance (exhaust) 0.025–0.052 mm (0.0010–0.0020 in)
Limit 0.095 mm (0.0037 in)
Valve stem runout 0.040 mm (0.0016 in)
Cylinder head valve seat width (intake) 0.90–1.10 mm (0.0354–0.0433 in)
Limit 1.6 mm (0.06 in)
Cylinder head valve seat width (exhaust) 1.10–1.30 mm (0.0433–0.0512 in)
Limit 1.8 mm (0.07 in)
Valve spring
Free length (intake) 37.47 mm (1.48 in)
Limit 35.60 mm (1.40 in)
Free length (exhaust) 37.67 mm (1.48 in)
Limit 35.79 mm (1.42 in)
Installed length (intake) 32.80 mm (1.29 in)
Installed length (exhaust) 32.80 mm (1.29 in)
Spring rate K1 (intake) 38.11 N/mm (217.61 lb/in) (3.89 kgf/mm)
Spring rate K2 (intake) 52.40 N/mm (299.20 lb/in) (5.34 kgf/mm)
Spring rate K1 (exhaust) 36.36 N/mm (207.62 lb/in) (3.71 kgf/mm)
Spring rate K2 (exhaust) 53.40 N/mm (304.91 lb/in) (5.45 kgf/mm)
Installed compression spring force (intake) 166.00–190.00 N (37.32–42.71 lb) (16.93–
19.37 kgf)
Installed compression spring force (exhaust) 165.00–189.00 N (37.09–42.49 lb) (16.83–
19.27 kgf)
D