Yamaha YZ250F(W), Руководство по эксплуатации для владельца

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ENG
VALVES AND VALVE SPRINGS
Valve spring
1. Measure:
• Valve spring free length
a
Out of specification
→
Replace.
2. Measure:
• Compressed spring force
a
Out of specification
→
Replace.
b
Installed length
Free length (valve spring):
Intake:
37.81 mm (1.49 in)
<Limit>: 36.81 mm (1.45 in)
Exhaust:
37.54 mm (1.48 in)
<Limit>: 36.54 mm (1.44 in)
Compressed spring force:
Intake:
99 ~ 114 N at 29.13 mm
(9.9 ~ 11.4 kg at 29.13 mm,
22.27 ~ 25.57 lb at 1.15 in)
Exhaust:
126 ~ 144 N at 29.30 mm
(12.6 ~ 14.4 kg at 29.30 mm,
28.44 ~ 32.41 lb at 1.15 in)
3. Measure:
• Spring tilt
a
Out of specification
→
Replace.
Spring tilt limit:
Intake:
2.5°/1.7 mm (0.067 in)
Exhaust:
2.5°/1.6 mm (0.063 in)
Valve lifter
1. Inspect:
• Valve lifter
Scratches/damage
→
Replace both lift-
ers and cylinder head.