Yamaha YZ450F(W) Owner's Service Manual page 77

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Valve spring:
Free length
Set length (valve closed)
Compressed force (installed)
Tilt limit
Direction of winding (top view)
Piston:
Piston to cylinder clearance
Piston size "D"
Measuring point "H"
Piston off-set
Piston pin bore inside diameter
Piston pin outside diameter
MAINTENANCE SPECIFICATIONS
Item
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
H
D
Standard
37.03 mm (1.46 in)
37.68 mm (1.48 in)
27.87 mm (1.10 in)
27.38 mm (1.08 in)
111.3 ~ 127.9 N at 27.87 mm
(11.3 ~ 13.0 kg at 27.87 mm,
24.91 ~ 28.66 lb at 1.10 in)
127.4 ~ 146.4 N at 27.38 mm
(13.0 ~ 14.9 kg at 27.38 mm,
28.66 ~ 32.85 lb at 1.08 in)
----
----
Clockwise
Clockwise
0.040 ~ 0.065 mm
(0.0016 ~ 0.0026 in)
94.945 ~ 94.960 mm
(3.738 ~ 3.739 in)
8 mm (0.315 in)
1 mm (0.0394 in)
18.004 ~ 18.015 mm
(0.7088 ~ 0.7093 in)
17.991 ~ 18.000 mm
(0.7083 ~ 0.7087 in)
2 - 6
SPEC
Limit
36.03 mm
(1.42 in)
36.68 mm
(1.44 in)
----
----
----
----
2.5°/1.61 mm
(2.5°/0.063 in)
2.5°/1.65 mm
(2.5°/0.065 in)
----
----
0.1 mm
(0.004 in)
----
----
----
18.045 mm
(0.7104 in)
17.971 mm
(0.7075 in)

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Yz450f 2007Yz450f w 2007Yz450f 2006Yz450fw 2006

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