Yamaha YFM250XL(C) Service Manual page 30

Guide inside diameter
Stem-to-guide clearance
Stem runout limit
2
Valve seat width
Valve spring:
Inner spring:
Free length
Set length (valve closed)
Compressed pressure
(installed)
Tilt limit
Direction of winding
(top view)
Outer spring:
Free length
Set length (valve closed)
MAINTENANCE SPECIFICATIONS
Item
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
* IN
EX
IN
EX
IN
EX
IN
EX
Standard
6.000~ 6.012mm
(0.236 ~ 0.237 in)
6.000~ 6.012mm
(0.236 ~ 0.237 in)
0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
0.025 ~ 0.052 mm
(0.001 ~ 0.002 in)
----
0.9 ~ 1.1 mm (0.035 ~ 0.043 in)
0.9 ~ 1.1 mm (0.035 ~ 0.043 in)
35.5 mm (1.4 in)
35.5 mm (1.4 in)
30.5 mm (1.2 in)
30.5 mm (1.2 in)
82.4 ~ 100.0 N
(8.4 ~ 10.2 kg, 18.5 ~ 22.5 lb)
82.4 ~ 100.0 N
(8.4 ~ 10.2 kg, 18.5 ~ 22.5 lb)
Counterclockwise
Counterclockwise
37.2 mm (1.46 in)
37.2 mm (1.46 in)
32.0 mm (1.26 in)
32.0 mm (1.26 in)
2 - 6
SPEC
Limit
----
----
0.08 mm
(0.0031 in)
0.10 mm
(0.0039 in)
0.03 mm
(0.0012 in)
----
----
----
----
----
----
----
----
2.5˚/ 1.6 mm
(2.5˚/0.06 in)
2.5˚/ 1.6 mm
(2.5˚/0.06 in)
----
----
----
----
----
----