Yamaha YZFR6X(C) 2008 Service Manual page 35

Timing chain
Model/number of links
Tensioning system
Valve, valve seat, valve guide
Valve clearance (cold)
Intake
Exhaust
Valve dimensions
Valve head diameter A (intake)
Valve head diameter A (exhaust)
A
Valve face width B (intake)
Valve face width B (exhaust)
Valve seat width C (intake)
Limit
Valve seat width C (exhaust)
Limit
Valve margin thickness D (intake)
Limit
Valve margin thickness D (exhaust)
Limit
Valve stem diameter (intake)
Limit
Valve stem diameter (exhaust)
Limit
Valve guide inside diameter (intake)
Limit
Valve guide inside diameter (exhaust)
Limit
Valve-stem-to-valve-guide clearance (intake)
Limit
Valve-stem-to-valve-guide clearance (exhaust)
Limit
B
C
D
2-4
ENGINE SPECIFICATIONS
98XRH2015/118
Automatic
0.12–0.19 mm (0.0047–0.0075 in)
0.16–0.23 mm (0.0063–0.0091 in)
26.90–27.10 mm (1.0591–1.0669 in)
22.90–23.10 mm (0.9016–0.9094 in)
1.410–2.550 mm (0.0555–0.1004 in)
1.400–2.670 mm (0.0551–0.1051 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)
0.90–1.10 mm (0.0354–0.0433 in)
0.8 mm (0.03 in)
1.10–1.30 mm (0.0433–0.0512 in)
1.0 mm (0.04 in)
4.475–4.490 mm (0.1762–0.1768 in)
4.460 mm (0.1756 in)
4.460–4.475 mm (0.1756–0.1762 in)
4.445 mm (0.1750 in)
4.500–4.512 mm (0.1772–0.1776 in)
4.542 mm (0.1788 in)
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)