ENGLISH
35
MAINTENANCE WORK ON CHASSIS AND ENGINE
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Changing the original position of the clutch lever
The adjusting screw
[1]
can be used for individual adjustment of the original
position of the clutch lever, thus allowing adjustment to an optimal position
for every hand size.
Turning the adjusting screw counterclockwise reduces the distance between
the clutch lever and the handlebar. Turning the adjusting screw clockwise
increases the distance between the clutch lever and the handlebar.
Adjustment of the clutch lever position is only possible within certain limits.
Only turn the adjusting screw manually and never apply excessive force.
Checking the oil level of the hydraulic clutch
To check the oil level in the master cylinder of the clutch remove the cover.
For this purpose, remove screws
[2]
and cover
[3]
together with the rubber
boot
[4]
. The oil level in the horizontal-standing master cylinder should be 4
mm below the upper edge.
250 SX-F:
if necessary, fill up with brake fluid DOT 4 or DOT 5.1 (e.g. Motorex
Brake Fluid DOT 5.1)
– Never use DOT 5 brake fluid! It is based on silicone oil and of a purple
color. Seals and brake hoses must be especially adapted to it.
– Store brake fluid out of reach of children.
– Brake fluid can cause skin irritation. Avoid contact with skin and eyes. If
you get brake fluid in your eyes, rinse with plenty of water and consult a
doctor.
– Don’t let brake fluid get in contact with paint, it is an effective paint remover.
– Use only clean brake fluid taken from a tightly sealed container.
450 SX-F:
if necessary, fill up with biodegradable hydraulic oil SAE 10 (e.g.
Motorex Kupplungs-Fluid 75). Biodegradable hydraulic oil is available from
your KTM dealer (50ml).
KTM uses biodegradable, hydraulic mineral oil to actuate the hydraulic clutch
of the 450 SX-F-model. Do not mix this oil with any other hydraulic oil. Always
use original KTM hydraulic oil (available from your authorized KTM workshop)
to make sure your clutch operates smoothly. Never refill with brake fluid.
Bleeding of the hydraulic clutch *
If the clutch lever starts to feel unresponsive, the clutch control system needs
to be bled. You will need a bleeder syringe (special tool), available from your
KTM dealer.
Turn the handlebar until the master cylinder is in a horizontal position, remove
the screws
[2]
, the cover
[3]
and the rubber boot
[4]
.
Fill the bleeder syringe
[5]
with brake fluid (250 SX-F) or biodegradable hydraulic
oil (450 SX-F).
KTM uses brake fluid DOT 5.1 for 250 SX-F and biodegradable, hydraulic
mineral oil for 450 SX-F to actuate the hydraulic clutch - see above.
Remove the bleeder screw
[6]
from the slave cylinder and mount the bleeder
syringe. Press oil into the system until the oil runs out of the hole
[7]
in the
master cylinder without bubbles. Occasionally extract the oil from the master
cylinder reservoir to keep it from overflowing.
After you finish bleeding, remove the bleeder syringe, mount the bleeder screw,
correct the oil level in the reservoir and mount the cover (see above).
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