KTM 50 SX 2020, Руководство пользователя

Страница: 103 / 141

TUNING THE ENGINE 15
101
Info
If there is a big engine speed rise, reduce the idle
speed to a normal level and repeat the above steps.
If the procedure described here does not lead to sat-
isfactory results, the cause may be a wrongly dimen-
sioned idling jet.
If you can turn the idle air adjusting screw to the end
without any change of engine speed, mount 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.
15.7 Carburetor
–
adjusting the idle speed (50 SX Mini)
H00078-10
–
Screw in idle air adjusting screw
2
all the way and turn it to
the specified basic setting.
Guideline
Idle air adjusting screw
Open 1 turn
–
Run the engine until warm.
Guideline
Warming-up phase
≥
5 min
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 using idle speed adjusting screw
1
.
Guideline
Choke function deactivated
–
The choke lever is pushed
down all the way to the stop. ( p. 18)
Idle speed 1,400 … 1,500 rpm
–
Turn idle air adjusting screw
2
slowly in a clockwise direc-
tion until the idle speed begins to fall.
–
Note the position and turn the idle air adjusting screw slowly
counterclockwise until the idle speed again begins to fall.
–
Adjust to the point between these two positions with the high-
est idle speed.