2 - 7
SPEC
Winding direction (top view)
Intake
Counterclockwise
----
Exhaust
Counterclockwise
----
Outer spring
Free length
Intake
36.93 mm (1.45 in)
35.00 mm
(1.38 in)
Exhaust
36.93 mm (1.45 in)
35.00 mm
(1.38 in)
Installed length (valve closed)
Intake
31.60 mm (1.24 in)
----
Exhaust
31.60 mm (1.24 in)
----
Spring rate - intake (K1)
23.18 N/mm (2.36 kgf/mm, 132.36 lb/in)
----
Spring rate - intake (K2)
31.66 N/mm (3.23 kgf/mm, 180.78 lb/in)
----
Spring rate - exhaust (K1)
23.18 N/mm (2.36 kgf/mm, 132.36 lb/in)
----
Spring rate - exhaust (K2)
31.66 N/mm (3.23 kgf/mm, 180.78 lb/in)
----
Compression spring force
(installed)
Intake
115 ~ 133 N (11.73 ~ 13.56 kgf,
25.85 ~ 29.90 lbf)
----
Exhaust
115 ~ 133 N (11.73 ~ 13.56 kgf,
25.85 ~ 29.90 lbf)
----
Spring tilt
Intake
----
2.5°/1.6 mm
(2.5°/0.063 in)
Exhaust
----
2.5°/1.6 mm
(2.5°/0.063 in)
Winding direction
Intake
Clockwise
----
Exhaust
Clockwise
----
Cylinder
Bore
69.000 ~ 69.005 mm (2.7165 ~ 2.7167 in)
69.100 mm
(2.7205 in)
Maximum taper
----
0.050 mm
(0.0020 in)
Maximum out of round
----
0.030 mm
(0.0012 in)
Item
Standard
Limit
Summary of Contents for YP250R 2005
Page 1: ...YP250R SERVICE MANUAL 2005 1C0 F8197 E0 ...
Page 368: ...YAMAHA MOTOR ESPAÑA S A ...
