Yamaha XP500 Service Manual page 46

Item
Valve stem runout
Valve seat width
Intake
Exhaust
Valve springs
Free length
Intake
Exhaust
Installed length (valve closed)
Intake
Exhaust
Spring rate (K1)
Intake
Exhaust
Spring rate (K2)
Intake
Exhaust
Compressed spring force (installed)
Intake
Exhaust
Spring tilt
Intake (inner)
Exhaust
ENGINE SPECIFICATIONS
Standard
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0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in)
0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in)
35.59 mm (1.40 in)
35.59 mm (1.40 in)
30.39 mm (1.20 in)
30.39 mm (1.20 in)
18.84 N/mm (1.92 kg/mm, 107.60 lb/in)
18.84 N/mm (1.92 kg/mm, 107.60 lb/in)
24.52 N/mm (2.50 kg/mm, 140.01 lb/in)
24.52 N/mm (2.50 kg/mm, 140.01 lb/in)
91.2 ~ 104.9 N at 30.4 mm
(9.3 ~ 10.7 kg at 30.4 mm,
20.5 ~ 23.6 lb at 1.20 in)
91.2 ~ 104.9 N at 30.4 mm
(9.3 ~ 10.7 kg at 30.4 mm,
20.5 ~ 23.6 lb at 1.20 in)
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2 - 6
SPEC
Limit
0.04 mm
(0.0016 in)
1.6 mm
(0.06 in)
1.6 mm
(0.06 in)
33.81 mm
(1.33 in)
33.81 mm
(1.33 in)
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2.5°/1.6 mm
(2.5°/0.06 in)
2.5°/1.6 mm
(2.5°/0.06 in)