Carburetor - Idle (50 Sx Mini); Carburetor - Adjusting Idle Speed (50 Sx) - KTM 50 SX MINI 2010 Owner's Manual

MAINTENANCE WORK ON CHASSIS AND ENGINE

Carburetor - idle (50 SX Mini)

9.80
Carburetor - adjusting idle speed
9.81
The idle setting of the carburetor has a big influence on the starting behavior, stable
idling and the response to throttle opening. That means that an engine with a correctly
set idle speed is easier to start than if the idle is set wrongly.
Info
The carburetor and its components are subject to increased wear caused by
engine vibration. Wear can result in malfunctioning.
The idle speed is adjusted with the adjustment screw
700522-01
The idle mixture is adjusted with the idle mixture adjustment screw
(50 SX)
x
–
Screw in the idle adjusting screw
setting.
Guideline
Idle mixture adjusting screw
Open
–
Run the engine until warm.
Guideline
Warm-up time
700520-01
Danger
Danger of poisoning Exhaust gases are poisonous and can result in uncon-
sciousness and/or death.
–
When running the engine, always make sure there is sufficient venti-
lation, and do not start or run the engine in a closed space without an
effective exhaust extraction system.
–
Adjust the idle speed with the adjusting screw
Guideline
Choke function deactivated – Choke knob is in lower position. No O-ring is visi-
ble. ( p. 11)
Idle speed
–
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 the speed rise is too high, reduce the idle speed to a normal level and
repeat the preceding steps.
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 install a smaller idling jet.
After changing the idling jet, start from the beginning with the adjusting
steps.
Following extreme air temperature or altitude changes, adjust the idle speed
again.
.

until it stops and then to the prescribed basic

3 turns
≥ 5 min
.

1,400... 1,500 rpm
slowly clockwise until the idle speed begins to fall.

54
.
