Fantic Motor TZ 125 2011, Руководство пользователя

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Check the condition of the spark plug, make sure the ingnition timing is cor-
rect, service the air cleaner element, decarbonize the exhaust tube
If you machine has run properly up to this point, it is possible that the prob-
lem is elsewhere; changing the carburetor settings in such a case would prob-
ably be a waste of time.
Spark plug condition
Mixture Correct
Isolante asciutto colore chiaro
Mixture Too lean Isolante bianco
Aumentare di un
livello la carburazi-
one
Mixture Too rich
Isolante asciutto colore scuro
Diminuire di un livel-
lo la carburazione.
- Set the carburetor so that the engine delivers satisfactory power with the
throttle valve opened.
- If the air-fuel mixture is too lean, the engine tends to overheat and may
be seized. On the other hand, if it is too rich, the spark plug easily gets wet
and causes mis fi res. The proper mixture varies depending on atmospheric
conditions. Taking these conditions into consideration, adjust the carbu-
retor settings properly.
NOTE
Keep in mind that the carburetor components that regulate fuel fl ow and
the screw that control the fl ow of air must be tight.
The standard competition measurements 250 are an example.
Fuel Unleaded
Throttle valve 7
Idle jet 42
Needle N1EF
Main Jet 180
Correction factors
(For altitude or temperature changes).
1. Find the correction factor to adjust the carburetor.
Example: 1000 meters altitude with an air temperature of 35°C. The cor-
rection factor is 0.94.
2. Using the correction factor, select the correct slow jet and main jet.
Example: For a correction factor of 0.94 multiply the jet size by that num-
ber.
Main jet: # 180 x 0.94 = # 170.
3. Find the correction factor on the Jet Needle / Air Screw chart and change
the jet needle clip position and air screw opening as indicated.
- Jet needle clip setting: from the 3rd groove to the 2nd groove.
- Air screw opening: 1 1/2 + 1 turn = 2 1/2 turns out.
NOTE
For the following recommendations to be accurate, you must use the
standard settings as a base-line. Also do not change any of the settings
until you have determined what changes are necessary. All speci fi cations
are based on the use of the fuel and oil speci fi ed.