Yamaha XS650SE Shop Manual page 128

9. VALVE, VALVE SEAT AND VALVE GUIDE
1) Valve per cylinder
2) Valve clearance IIn cold engine)
3) Dimensions
Valve head diameter "A"
Valve face width "6"
Valve seat width "C"
Valve margin thickness "D"
Valve stem diameter
Valve guide diameter
Valve stem to guide clearance
4) Valve face runout limit
0. VALVE SPRING
1)
Free length
3) Installed length (Valve closed)
41 Installed pressure (Valve closed)
5) Compressed length (Valve open)
6) Compressed pressure (Valve open)
7) Wire diameter
8) Winding O.D.
91 Number of windings
2 pcs.
IN: 0.06 mm (0.0024 in)
EX: 0.15 mm (0.0059 in)
IN: 41 mm (1.614 in)
EX: 35 mm (1.378 in)
IN: 2.1 mm (0.083 in)
EX: 2.1 mm (0.083 in)
IN: 1.3 mm (0.051 in)
EX: 1.3 mm (0.051 in)
IN: 1.3 mm (0.051 in)
EX: 1.3 mm (0.051 in)
IN: 8.0_g,o,5 mm (0.315_&,,0 in)
IN: E.O:~:~~", mm (0.315 :z:gi in)
EX: S.O:$~~~ mm (0.315 z:Ez in)
IN: O.OlO- 0.034 mm (0.00079- 0.00173 in)
EX: 0.035 - 0.059 mm 10.00138 - 0.00232 in)
IN & EX: 0.03 mm 10.0012 in) or less
INNER (IN/EX): 42 mm (1.654 in)
INNER (IN/EX): kl = 1.43 kg/mm 180.1 lb/in)
INNER (INIEXI: 35 mm 11.378 in)
INNER (IN/EX): 10 f 0.7 kg (22.0 f 1.5 lb)
INNER (IN/EX): 25.5 mm (1.004 in)
INNER (IN/EX): 27.2 f 1.9 kg (60.0 f 4.2 lb)
INNER (IN/EX): 2.9mm (0.114 in)
INNER (IN/EX): 19.4 mm (0.764 in)
INNER IINIEXI: 6.0 turns