Yamaha 2004 YP400 Service Manual page 36

Item
Valve stem runout
Valve seat width
Intake
Exhaust
Valve springs
Free length
Intake
Exhaust
Installed length (valve closed)
Intake
Exhaust
Compressed spring force (installed)
Intake
Exhaust
Spring tilt
Intake
Exhaust
Winding direction (top view)
Intake
Exhaust
ENGINE SPECIFICATIONS
Standard
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1.0 ~ 1.2 mm (0.0394 ~ 0.0472 in)
1.0 ~ 1.2 mm (0.0394 ~ 0.0472 in)
46.45 mm (1.83 in)
46.45 mm (1.83 in)
35.10 mm (1.38 in)
35.10 mm (1.38 in)
160.5 ~ 184.7 N at 35.10 mm
(16.37 ~ 18.83 kg at 35.10 mm,
36.08 ~ 41.52 lb at 1.38 in)
160.5 ~ 184.7 N at 35.10 mm
(16.37 ~ 18.83 kg at 35.10 mm,
36.08 ~ 41.52 lb at 1.38 in)
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Clockwise
Clockwise
2 - 6
SPEC
Limit
0.01 mm
(0.0004 in)
1.6 mm
(0.06 in)
1.6 mm
(0.06 in)
44.13 mm
(1.74 in)
44.13 mm
(1.74 in)
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2.0 mm
(0.08 in)
2.0 mm
(0.08 in)
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