Emptying The Carburetor Float Chamber - KTM 400 EXC EU 2010 Owner's Manual

MAINTENANCE WORK ON CHASSIS AND ENGINE

Emptying the carburetor float chamber

9.103
Danger
Fire hazard Fuel is highly flammable.
–
Never refuel the vehicle near open flames or burning cigarettes, and always switch off the engine first. Be careful that no
fuel is spilt, especially on hot vehicle components. Clean up spilt fuel immediately.
–
Fuel in the fuel tank expands when warm and can escape if the tank is overfilled. See the notes on refueling.
Warning
Danger of poisoning Fuel is poisonous and a health hazard.
–
Avoid contact between fuel and skin, eyes and clothing. Do not inhale fuel vapors. If fuel gets into your eyes, rinse immedi-
ately with water and contact a doctor. Wash affected skin areas immediately with soap and water. If fuel is swallowed, con-
tact a doctor immediately. Change clothing that has come into contact with fuel. Store fuel in a suitable canister according
to regulations and keep it out of the reach of children.
Warning
Environmental hazard Improper handling of fuel is a danger to the environment.
–
Do not allow fuel to get into the ground water, the ground, or the sewage system.
Info
Carry out this work with a cold engine.
–
Turn the idle adjusting screw
–
Note the position and turn the idle adjusting screw slowly counterclockwise until
the idle speed falls.
–
Adjust to the point between these two positions with the highest idle speed.
Info
If there is a big engine speed rise, reduce the idle speed to a normal level
and repeat the above steps.
The extreme sport motorcyclist will set the mixture about ¼ of a turn back
from this ideal value (leaner, in a clockwise direction) since the engine
becomes hotter in sporting use.
If the procedure described here does not lead to satisfactory results, the
cause may be a wrongly dimensioned idling jet.
If you can turn the idle adjusting screw to the end without any change of
engine speed, you have to mount a smaller idling jet.
The idle adjusting screw must not be opened more than two turns. If more
than two turns are necessary (rich mixture), use a larger idling jet.
After changing the idling jet, start from the beginning with the adjusting
steps.
–
Adjust the idle speed with adjusting screw
Guideline
Choke function deactivated – The choke lever is pushed in to the stop.
(EXC AUS, XC‑W, XC‑W SIX DAYS) (
Choke function deactivated – The choke lever is pushed back to the stop.
(EXC EU, EXC SIX DAYS) (
Idle speed
Info
Following extreme air temperature or altitude changes, adjust the idle speed
again.
x
–
Turn handle of the fuel tap to the OFF position. (Figure 500137-10

No more fuel flows from the tank to the carburetor.
slowly until the idle speed begins to fall.

.

p. 20)
p. 21)
1,550... 1,650 rpm
79
p. 20)