Yamaha YP400T, YP400V, YP400W Service Manual page 29

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
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)
15.21 N/mm (1.55 kg/mm, 86.77 lb/in)
15.21 N/mm (1.55 kg/mm, 86.77 lb/in)
19.84 N/mm (2.02 kg/mm, 113.28 lb/in)
19.84 N/mm (2.02 kg/mm, 113.28 lb/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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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)