Yamaha YFM250XL(C) Service Manual page 31

Item
Compressed pressure
(installed)
Tilt limit
*
Direction of winding
(top view)
Piston:
Piston to cylinder clearance
Piston size "D"
D
Measuring point "H"
Piston off-set
Piston off-set direction
Piston pin bore inside diameter
Piston pin outside diameter
Piston rings:
Top ring:
Type
Dimensions (B × T)
End gap (installed)
MAINTENANCE SPECIFICATIONS
IN 162.8 ~ 200.1 N
(16.6 ~ 20.4 kg, 36.6 ~ 45.0 lb)
EX 162.8 ~ 200.1 N
(16.6 ~ 20.4 kg, 36.6 ~ 45.0 lb)
IN
EX
IN Clockwise
EX Clockwise
0.04 ~ 0.06 mm
(0.0016 ~ 0.0024 in)
70.92 ~ 70.97 mm
(2.792 ~ 2.794 in)
H
4.0 mm (0.16 in)
from bottom line of piston skirt
0.5 mm (0.02 in)
In side
16.002 ~ 16.013 mm
(0.6300 ~ 0.6304 in)
15.991 ~ 16.000 mm
(0.6296 ~ 0.6299 in)
B
T
Barrel
1.2 × 2.8 mm (0.047 × 0.110 in)
0.15 ~ 0.30 mm
(0.006 ~ 0.012 in)
2 - 7
SPEC
Standard
----
----
2.5˚/1.6 mm
(2.5˚/0.06 in)
2.5˚/1.6 mm
(2.5˚/0.06 in)
----
----
0.15 mm
(0.0059 in)
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----
----
----
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0.4 mm
(0.016 in)
Limit
2