Engine - Yamaha YZ125X1 Owner's Service Manual

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)
• STANDARD POSITION:
This is the position which is back
by the specific number of clicks
from the fully turned-in position.
Standard position:
14 clicks out
* 13 clicks out
* For EUROPE
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.
ADJUSTING THE FRONT FORK
COMPRESSION DAMPING FORCE
1. Adjust:
• Compression damping force
By turning the adjuster "1".
→
Stiffer "a" Increase the com-
pression damping force. (Turn
the adjuster "1" in.)
→
Softer "b" Decrease the com-
pression damping force. (Turn
the adjuster "1" out.)
Extent of adjustment:
Maximum Minimum
20 clicks out
Fully turned in
(from maximum
position
position)
• STANDARD POSITION:
This is the position which is back
by the specific number of clicks
from the fully turned-in position.
Standard position:
13 clicks out
* 12 clicks out
* For EUROPE
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
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. Loosen:
• Locknut "1"
3-13
4. Adjust:
• Spring preload
By turning the adjuster "2".
→
Stiffer
load. (Turn the adjuster "2" in.)
→
Softer Decrease the spring pre-
load. (Turn the adjuster "2"
out.)
Spring length (installed)
"a":
Standard
length
One I.D. mark
258 mm
(10.16 in)
*252 mm (9.92
in)
Two I.D. marks
264 mm
(10.39 in)
*258 mm
(10.16 in)
Three I.D.
marks
255.5 mm
(10.06 in)
*249.5 mm
(9.82 in)
* For EUROPE
• Be sure to remove all dirt and mud
from around the locknut and adjust-
er before adjustment.
• The length of the spring (installed)
Replace.
changes 1.5 mm (0.06 in) per turn
of the adjuster.
• The I.D. mark "b" is marked at the
end of the spring.
• The standard length and extent of
adjustment vary according to the
quantity of I.D. marks.
Never attempt to turn the adjuster
beyond the maximum or minimum
setting.
CHASSIS
Increase the spring pre-
Extent of ad-
justment
245.5–263.5
mm (9.67–10.37
in)
251.5–269.5
mm (9.90–10.61
in)
243.0–261.0
mm (9.57–10.28
in)