TUNING THE ENGINE 15
87
Finishing work
–
Install the fuel tank.
–
Mount the seat. (
–
Check the play in the throttle cable. (
15.3
Carburettor
–
idle speed
F03009-10
The idle setting of the carburetor has a big influence on the starting
behavior, stable idle speed, and the response to throttle opening. 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 malfunc-
tioning.
The idle speed is adjusted using the idle speed adjusting screw
1
.
The idle mixture is adjusted using the idle air adjusting screw
2
.
15.4
Carburetor
–
adjusting the idle speed
F03009-10
–
Screw in idle air adjusting screw
2
all the way and turn it to the
specified basic setting.
Guideline
Idle air adjusting screw
Open
3 turns
–
Run the engine until warm.
Guideline
Warming-up phase
≥
5 min
–
Connect the special tool.
Tachometer (45129075000)
Danger
Danger of poisoning
Exhaust gases are toxic and inhaling
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 run-
ning 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 in to the
stop. (
Idle speed
1,400 … 1,500 rpm
–
Turn idle air adjusting screw
2
slowly in a clockwise direction until
the idle speed begins to fall.
–
Note the position and turn the idle air adjusting screw slowly coun-
terclockwise until the idle speed again begins to fall.
