Yamaha RAPTOR YFM125RA Service Manual page 28

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)
Valve margin thickness D (exhaust)
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
(exhaust)
Limit
Valve stem runout limit
Cylinder head valve seat width (intake)
Limit
Cylinder head valve seat width (exhaust)
Limit
Valve spring
Free length (intake)
Limit
ENGINE SPECIFICATIONS
0.08–0.12 mm (0.0032–0.0047 in)
0.10–0.14 mm (0.0039–0.0055 in)
25.90–26.10 mm (1.0197–1.0276 in)
21.90–22.10 mm (0.8622–0.8701 in)
1.10–3.00 mm (0.0433–0.1181 in)
1.70–2.80 mm (0.0669–0.1102 in)
0.90–1.10 mm (0.0354–0.0433 in)
1.60 mm (0.06 in)
0.90–1.10 mm (0.0354–0.0433 in)
1.60 mm (0.06 in)
0.40–0.80 mm (0.0157–0.0315 in)
0.80–1.20 mm (0.0315–0.0472 in)
4.975–4.990 mm (0.1959–0.1965 in)
4.950 mm (0.1949 in)
4.960–4.975 mm (0.1953–0.1959 in)
4.935 mm (0.1943 in)
5.000–5.012 mm (0.1969–0.1973 in)
5.042 mm (0.1985 in)
5.000–5.012 mm (0.1969–0.1973 in)
5.042 mm (0.1985 in)
0.010–0.037 mm (0.0004–0.0015 in)
0.080 mm (0.0032 in)
clearance
0.025–0.052 mm (0.0010–0.0020 in)
0.100 mm (0.0039 in)
0.010 mm (0.0004 in)
0.90–1.10 mm (0.0354–0.0433 in)
1.60 mm (0.06 in)
0.90–1.10 mm (0.0354–0.0433 in)
1.60 mm (0.06 in)
47.06 mm (1.85 in)
44.71 mm (1.76 in)
2-5