Yamaha 2010 XMAX YP125R Service Manual page 81

Timing chain
Tensioning system
Rocker arm/rocker arm shaft
Rocker arm inside diameter
Limit
Rocker arm shaft outside diameter
Limit
Rocker-arm-to-rocker-arm-shaft clearance
Limit
Valve, valve seat, valve guide
Valve clearance (cold)
Intake
Exhaust
Valve dimensions
Valve head diameter A (intake)
Valve head diameter A (exhaust)
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
A
B
C
D
ENGINE SPECIFICATIONS (YP250R)
Automatic
12.000–12.018 mm (0.4724–0.4731 in)
12.030 mm (0.4736 in)
11.981–11.991 mm (0.4717–0.4721 in)
11.950 mm (0.4705 in)
0.009–0.037 mm (0.0004–0.0015 in)
0.080 mm (0.0031 in)
0.08–0.12 mm (0.0031–0.0047 in)
0.16–0.20 mm (0.0063–0.0079 in)
33.90–34.10 mm (1.3346–1.3425 in)
28.40–28.60 mm (1.1181–1.1260 in)
3.394–3.960 mm (0.1336–0.1559 in)
3.394–3.960 mm (0.1336–0.1559 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)
0.80–1.20 mm (0.0315–0.0472 in)
0.5 mm (0.02 in)
0.80–1.20 mm (0.0315–0.0472 in)
0.5 mm (0.02 in)
5.975–5.990 mm (0.2352–0.2358 in)
5.940 mm (0.2339 in)
5.960–5.975 mm (0.2346–0.2352 in)
5.920 mm (0.2331 in)
2-50