17 TUNING THE ENGINE 82
17.1 Checking the play in the throttle cable
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– Check the throttle grip for smooth operation.
– Move the handlebar to the straight-ahead position. Move the throttle grip back-
wards and forwards to ascertain the play in the throttle cable.
Throttle cable play 3… 5 mm (0.12… 0.2 in)
» If the throttle cable play does not meet specifications:
–
Adjust the play in the throttle cable. x ( p. 82)
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.
– Start the engine and let it run idle. Move the handlebar to and fro over the entire
steering range.
The idle speed must not change.
» If the idle speed changes:
–
Adjust the play in the throttle cable. x ( p. 82)
17.2 Adjusting the play in the throttle cable x
Preparatory work
– Fold the seat up. ( p. 45)
–
Remove the fuel tank. x ( p. 48)
– Check the throttle cable routing. ( p. 54)
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Main work
– Move the handlebar to the straight-ahead position.
– Push back sleeve 1.
– Ensure that the throttle cable sleeve is pushed fully into adjusting screw 2.
– Loosen nut 3.
Guideline
Throttle cable play 3… 5 mm (0.12… 0.2 in)
– Tighten nut 3.
– Slide on sleeve 1.
– Check the throttle grip for smooth operation.
Finishing work
–
Install the fuel tank. x ( p. 49)
– Lock the seat. ( p. 45)
– Check the play in the throttle cable. ( p. 82)
17.3 Carburetor - idle
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The idle setting of the carburetor has a big influence on the starting behavior, stable
idling and the response to throttle opening. This 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 factory setting for the carburetor is set for the following values.
Elevation above sea level 500 m (1,640 ft)
Ambient temperature 20 °C (68 °F)
Super unleaded (95 octane) mixed with 2-stroke engine oil (1:80) ( p. 101)
The idle speed is adjusted with adjusting screw 1.
The idle mixture is adjusted with the idle air adjusting screw 2.
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