KTM 50 SX 2012 User Manual

15 TUNING THE ENGINE 63
15.4 Carburetor - idle (50 SX)
700520-01
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 idle adjustment screw 1.
The idle mixture is adjusted with the idle mixture adjustment screw 2.
15.5 Carburetor - idle (50 SX Mini)
700522-01
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 1.
The idle mixture is adjusted with the idle mixture adjustment screw 2.
15.6 Carburetor - adjusting idle speed x (50 SX)
700520-01
– Screw in the idle adjusting screw 2 until it stops and then to the prescribed basic
setting.
Guideline
Idle mixture adjusting screw
Open 3 turns
– Run the engine until warm.
Guideline
Warm-up time ≥ 5 min
Danger
Danger of poisoning Exhaust gases are toxic and inhaling them may result
in unconsciousness and/or death.
– When running the engine, always make sure there is sufficient ventila-
tion, and do not start or run the engine in an enclosed space without an
effective exhaust extraction system.
– Adjust the idle speed with the adjusting screw 1.
Guideline
Choke function deactivated – Choke knob is in lower position. No O-ring is visi-
ble. ( p. 14)
Idle speed 1,400… 1,500 rpm
– Turn the idle adjusting screw 2 slowly clockwise until the idle speed begins to fall.
– 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.

KTM 50 SX 2012 Specifications

General

Brand	KTM
Model	50 SX 2012
Category	Motorcycle
Language	English