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YAMAHA YZ250F(Y) Owner's Service Manual Page 65

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• STANDARD POSITION:
This is the position which is back
by the specific number of clicks
from the fully turned-in position.
Standard position:
9 clicks out
Do not force the adjuster past the
minimum or maximum extent of
adjustment. The adjuster may be
damaged.
Always adjust each front fork to
the same setting. Uneven adjust-
ment can cause poor handling and
loss of stability.
CHECKING THE REAR SHOCK
ABSORBER
1. Inspect:
• Swingarm smooth action
Abnormal noise/unsmooth action
→ Grease the pivoting points or
repair the pivoting points.
Damage/oil leakage → Replace.
ADJUSTING THE REAR SHOCK
ABSORBER SPRING PRELOAD
1. Elevate the rear wheel by placing
the suitable stand under the en-
gine.
2. Remove:
• Rear frame
3. Measure:
• Spring fitting length
Standard fitting length:
I.D. MARK/
Length
Q'TY
Yellow/1
251 mm
(9.98 in)
* 248 mm
(9.76 in)
* Except for USA and CDN
The I.D. mark "a" is marked at the end
of the spring.
4. Adjust:
• Spring preload
Adjustment steps:
a. Loosen the locknut "1".
b. Loosen the adjuster "2" until there
is some clearance between the
spring and adjuster.
c. Measure the spring free length
"a".
d. Turn the adjuster "2".
Stiffer → Increase the spring pre-
load. (Turn the adjuster "2" in.)
Softer → Decrease the spring pre-
load. (Turn the adjuster "2"
out.)
Extent of adjustment:
Maximum
Minimum
Position in
Position in
which the
which the
spring is turned
spring is turned
in 13 mm (0.51
in 1.5 mm (0.06
in) from its free
in) from its free
length.
length.
3-19
CHASSIS
• Be sure to remove all dirt and mud
from around the locknut and adjust-
er before adjustment.
• The length of the spring (installed)
changes 1.5 mm (0.06 in) per turn
of the adjuster.
Never attempt to turn the adjuster
beyond the maximum or minimum
setting.
e. Tighten the locknut.
Locknut:
30 Nm (3.0 m•kg, 22
ft•lb)
5. Install:
• Rear frame (upper)
Rear frame (upper):
38 Nm (3.8 m•kg, 27
ft•lb)
• Rear frame (lower)
Rear frame (lower):
32 Nm (3.2 m•kg, 23
ft•lb)
ADJUSTING THE REAR SHOCK
ABSORBER REBOUND DAMPING
FORCE
1. Adjust:
• Rebound damping force
By turning the adjuster "1".
Stiffer "a" → Increase the re-
bound damping force. (Turn
the adjuster "1" in.)
Softer "b" → Decrease the re-
bound damping force. (Turn
the adjuster "1" out.)
Extent of adjustment:
Maximum
Minimum
20 clicks out
Fully turned in
(from maximum
position
position)

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This manual also for:

Yz250f 2009, Yz250fy 2009

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  • Dave May 30, 2016 02:21:
    Really good really good really goodj