Yamaha 2009 XP500Y TMAX Service Manual page 31

Limit
B
Camshaft runout limit
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)
A
B
C
2-4
ENGINE SPECIFICATIONS
24.856 mm (0.9786 in)
0.030 mm (0.0012 in)
SCR-0409 SV/132
Automatic
0.15–0.20 mm (0.0059–0.0079 in)
0.25–0.30 mm (0.0098–0.0118 in)
24.90–25.10 mm (0.9803–0.9882 in)
21.90–22.10 mm (0.8622–0.8701 in)
1.140–1.980 mm (0.0449–0.0780 in)
1.140–1.980 mm (0.0449–0.0780 in)
0.90–1.10 mm (0.0354–0.0433 in)
1.6 mm (0.06 in)
0.90–1.10 mm (0.0354–0.0433 in)
1.6 mm (0.06 in)
0.60–0.80 mm (0.0236–0.0315 in)