Yamaha WR250F Fahrer- Und Wartungshandbuch Seite 99

Stem runout limit
Valve seat width
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
MAINTENANCE SPECIFICATIONS
Item
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
H
D
Standard
----
0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
36.58 mm (1.44 in)
37.54 mm (1.48 in)
29.13 mm (1.15 in)
29.30 mm (1.15 in)
103 ~ 118 N at 29.13 mm
(10.50 ~ 12.09 kg at 29.13 mm,
23.15 ~ 26.66 lb at 1.15 in)
126 ~ 144 N at 29.30 mm
(12.85 ~ 14.68 kg at 29.30 mm,
28.32 ~ 32.37 lb at 1.15 in)
----
----
Clockwise
Clockwise
0.030 ~ 0.055 mm
(0.0012 ~ 0.0022 in)
76.955 ~ 76.970 mm
(3.0297 ~ 3.0303 in)
8 mm (0.31 in)
0.5 mm (0.020 in)/IN-side
2 - 6
SPEC
Limit
0.01 mm
(0.0004 in)
1.6 mm
(0.0630 in)
1.6 mm
(0.0630 in)
35.58 mm
(1.40 in)
36.54 mm
(1.44 in)
----
----
----
----
2.5°/1.6 mm
(2.5°/0.063 in)
2.5°/1.6 mm
(2.5°/0.063 in)
----
----
0.1 mm
(0.004 in)
----
----
----