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10
TUNING THE CHASSIS
10.7
Checking the static sag of the shock absorber
10.8
Checking the riding sag of the shock absorber
10.9
Adjusting the spring preload of the shock absorber
Caution
Danger of accidents Disassembly of pressurized parts can lead to injury.
–
The shock absorber is filled with high density nitrogen. Adhere to the description provided. (Your authorized KTM workshop
will be glad to help.)
Info
Before changing the spring preload, make a note of the present setting, e.g., by measuring the length of the spring.
–
Measure distance
–
Hold the motorcycle upright with the aid of an assistant.
–
Measure the distance between the rear axle and the fixed point again.
0 0 A
A
–
Note down the value as dimension
Info
The static sag is the difference between measurements
–
Check the static sag.
Static sag (250 SX‑F EU)
Static sag (SX‑F USA)
Static sag (XC‑F)
B
0 0 B
»
If the static sag is less or more than the specified value:
–
Adjust the spring preload of the shock absorber.
400989-10
–
Measure distance
–
With another person holding the motorcycle, the rider, wearing full protective cloth-
ing, sits on the seat in a normal sitting position (feet on footrests) and bounces up
0 0 A
A
and down a few times.
The rear wheel suspension levels out.
–
Another person now measures the distance between the rear axle and the fixed
point.
–
Note down the value as dimension
Info
The riding sag is the difference between measurements
–
Check the riding sag.
Riding sag (250 SX‑F EU)
C
0 0 C
Riding sag (SX‑F USA)
Riding sag (XC‑F)
»
If the riding sag differs from the specified measurement:
400990-10
–
Adjust the riding sag.
Preparatory work
–
Raise the motorcycle with the lift stand. (
–
Remove the shock absorber.
of rear wheel unloaded. (
A
.
B
30 mm (1.18 in)
30 mm (1.18 in)
30 mm (1.18 in)
of rear wheel unloaded. (
A
.
C
90 mm (3.54 in)
100 mm (3.94 in)
100 mm (3.94 in)
(
p. 30)
x
x
p. 34)
(
p. 42)
x
p. 28)
and
.
A
B
(
p. 29)
x
p. 28)
and
.
A
C
29
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