Yamaha 2012 TMAX XP500A, Service Manual, Page: 59 / 530

ENGINE SPECIFICATIONS
2-4
Valve, valve seat, valve guide
Valve clearance (cold)
Intake 0.15–0.22 mm (0.0059–0.0087 in)
Exhaust 0.25–0.32 mm (0.0098–0.0126 in)
Valve dimensions
Valve head diameter (intake) 25.9–26.1 mm (1.0197–1.0276 in)
Valve head diameter (exhaust) 21.9–22.1 mm (0.8622–0.8701 in)
Valve face width (intake) 1.202–2.475 mm (0.0473–0.0974 in)
Valve face width (exhaust) 1.202–2.475 mm (0.0473–0.0974 in)
Valve seat width (intake) 0.90–1.10 mm (0.0354–0.0433 in)
Limit 1.6 mm (0.06 in)
Valve seat width (exhaust) 0.90–1.10 mm (0.0354–0.0433 in)
Limit 1.6 mm (0.06 in)
Valve margin thickness (intake) 0.50–0.90 mm (0.0197–0.0354 in)
Valve margin thickness (exhaust) 0.50–0.90 mm (0.0197–0.0354 in)
Valve stem diameter (intake) 3.975–3.990 mm (0.1565–0.1571 in)
Limit 3.945 mm (0.1553 in)
Valve stem diameter (exhaust) 3.960–3.975 mm (0.1559–0.1565 in)
Limit 3.930 mm (0.1547 in)
Valve guide inside diameter (intake) 4.000–4.012 mm (0.1575–0.1580 in)
Limit 4.050 mm (0.1594 in)
Valve guide inside diameter (exhaust) 4.000–4.012 mm (0.1575–0.1580 in)
Limit 4.050 mm (0.1594 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 0.100 mm (0.0039 in)
Valve stem runout 0.040 mm (0.0016 in)
Valve spring
Free length (intake) 36.73 mm (1.45 in)
Limit 34.89 mm (1.37 in)