15 TUNING THE ENGINE 65
15.1 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 play A in the throttle cable.
Play in gas throttle cable 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. 65)
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 idle. Move the handlebar to and fro over the entire steer-
ing range.
The idle speed should not change.
» If the idle speed changes:
–
Adjust the play in the throttle cable. x ( p. 65)
15.2 Adjusting the play in the throttle cable x
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– Move the handlebar to the straight-ahead position.
– Push back sleeve 1.
– Ensure that the throttle cable sleeve is pushed all the way into barrel adjuster 2.
– Loosen nut 3.
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– Turn barrel adjuster 2 until throttle cable play A exists at the bottom throttle
cable sleeve.
Guideline
Play in gas throttle cable 3… 5 mm (0.12… 0.2 in)
– Tighten nut 3.
– Slide on sleeve 1.
15.3 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. 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 adjusting screw 1.
The idle mixture is adjusted with idle adjusting screw 2.