Carburetor settings for .12 engines The carburetor of our NOVA/REX/TOP Engines are set at the factory with an vacuum measuring tool, before they are put in box, to obtain an setting for an easy start of your engine. If you are in trouble with your carburetor setting, this is a simple way to get back to the initial factory setting positions. |
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 | | The High Speed Needle (A) is in charge to adjust the quantity of fuel necessary for the engine when the throttle valve of the carburetor is full opened.
For a correct position, turn the needle-valve (clockwise) until it stops. Now it is fully closed.
(WARNING: do not force it to close it any futher, it will damage the needle!).
The High Speed Needle position is approximately 5 turns opened from the fully closed position. If you want to reposition the fuel nipple we suggest to use the following method:
- Replace the 2 aluminium rings (part number: 11016);
- Re-position the fuel nipple and tighten the needle support with 1,5Nm load;
- Check if the 2 aluminium rings are replaced and that there is no leakage. | |
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The Low Speed Needle (B) situated on the throttle is in charge to adjust the fuel flow when the throttle valve is moving with the throttle servo.
The position of the Low Speed Needle has to be opened 2,5 turns from a fully closed position. | |  | |
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The Idle screw (C) of your carburetor is used to adjust the air flow when the throttle valve is in the closed position (minimum RPM idle speed).
It must be turned to obtain a throttle setting of approximately 0.5mm open once the throttle is closed
(see picture on the right).
If needed, remove the venturi. | |  | |
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WARNING:
These settings help you to start your engine and are on the rich side, you still need to adjust your carburetor to get optimal performance.
This can varie on many different things like the fuel you use, the weather, tracks and your driving style. PICTURES ARE JUST INDICATIVE. |
