Yamaha TMAX XP500F 2015, Service Manual, Page: 37 / 478

ENGINE SPECIFICATIONS
2-4
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)
Free length (exhaust) 36.73 mm (1.45 in)
Limit 34.89 mm (1.37 in)
Installed length (intake) 30.60 mm (1.20 in)
Installed length (exhaust) 30.60 mm (1.20 in)
Spring rate K1 (intake) 16.95 N/mm (1.73 kgf/mm, 96.78 lbf/in)
Spring rate K2 (intake) 23.19 N/mm (2.36 kgf/mm, 132.41 lbf/in)
Spring rate K1 (exhaust) 16.95 N/mm (1.73 kgf/mm, 96.78 lbf/in)
Spring rate K2 (exhaust) 23.19 N/mm (2.36 kgf/mm, 132.41 lbf/in)
Installed compression spring force (intake) 96.60–111.20 N (9.85–11.34 kgf, 21.72–25.00
lbf)
Installed compression spring force (exhaust) 96.60–111.20 N (9.85–11.34 kgf, 21.72–25.00
lbf)
Spring tilt (intake) 1.6 mm (0.06 in)
Spring tilt (exhaust) 1.6 mm (0.06 in)
Winding direction (intake) Clockwise
Winding direction (exhaust) Clockwise
Cylinder
Bore 68.000–68.010 mm (2.6772–2.6776 in)
Taper limit 0.050 mm (0.0020 in)
Out of round limit 0.050 mm (0.0020 in)
Piston
Piston-to-cylinder clearance 0.010–0.035 mm (0.0004–0.0014 in)
Diameter 67.975–67.990 mm (2.6762–2.6768 in)
Measuring point (from piston skirt bottom) 9.0 mm (0.35 in)
Offset 0.25 mm (0.0098 in)
Offset direction Intake side
Piston pin bore inside diameter 16.002–16.013 mm (0.6300–0.6304 in)
Limit 16.043 mm (0.6316 in)
Piston pin outside diameter 15.991–16.000 mm (0.6296–0.6299 in)
Limit 15.971 mm (0.6288 in)
Piston-pin-to-piston-pin-bore clearance 0.002–0.022 mm (0.0001–0.0009 in)
Piston ring
Top ring
Ring type Barrel
End gap (installed) 0.25–0.35 mm (0.0098–0.0138 in)
Limit 0.60 mm (0.0236 in)
Ring side clearance 0.030–0.065 mm (0.0012–0.0026 in)
Limit 0.100 mm (0.0039 in)