Carburettor - Idle Speed; Carburetor - Adjusting The Idle Speed - KTM 300 EXC Owner's Manual

17 TUNING THE ENGINE
17.4
17.5
120
Carburettor – idle speed
402799-10
Carburetor – adjusting the idle speed
402799-11
The idle setting of the carburetor has a big influence on the start-
ing behavior, stable idle speed, and the response to throttle open-
ing. This means that an engine with a correctly set idle speed will
be easier to start than one with an incorrectly set idle speed.
Info
The carburetor and its components are subject to increased
wear caused by engine vibration. Wear can result in mal-
functioning.
The factory setting for the carburetor is set for the following val-
ues.
Height above sea 751 ... 1,500 m (2,464 ... 4,921 ft)
level
Ambient tempera- 16 ... 24 °C (61 ... 75 °F)
ture
Super unleaded, type C (ROZ 95/RON 95/PON 91 mixed with
2-stroke engine oil, 1:60) (
The idle speed is adjusted with adjusting screw
The idle mixture is adjusted using the idle air adjusting screw
–
Screw idle air adjusting screw
–
Turn the idle air adjusting screw to the specified basic setting.
Info
The basic setting of the carburetor is specified in the
technical data.
–
Run the engine until warm.
Guideline
Warming-up phase
–
Connect the special tool.
Tachometer (45129075000)
Danger
Danger of poisoning Exhaust gases are toxic and inhal-
ing them may result in unconsciousness and death.
–
Always make sure there is sufficient ventilation
when running the engine.
–
Use effective exhaust extraction when starting or
running the engine in an enclosed space.
–
Adjust the idle speed with adjusting screw
p. 145)
1
.
1
all the way in.
≥ 5 min
2
.
2
.