Emptying The Carburetor Float Chamber - KTM 450 SX-F EU Repair Manual

31/cARBURETOR
Empty!nllhe cartluretDr
nalt
cumber
. . . Danger
W
Fire hazard
Fuel is highly flammable.
188
- 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
I
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 114
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 fit 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 fu nction deactivated - The choke lever is pushed into the stop.
( ... p. 176)
Idle speed
I
1,550 ... 1,650 rpm
• Info
I
Following extreme air temperature or altitude changes, adjust the idle speed
again.
- 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
0'
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.
Warninl
Enviranmental 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
I
Carry out th is work with a cold engi ne.
Preliminary work
- Turn handle
of
the fuel tap to the OFF position. (Figure 800189-10'" p. 81)
. / No more fuel flows from the tank to the carburetor.