There are two important signs which indicate that the carburetor needs to be tuned. If you find the carburetor is too rich or too lean a metering rod change is in order.
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Demon carb too rich. Please read and understand this manual completely to assure that you get the most out of your new demon carburetor. What i do know is the car runs very rich. If you notice these symptoms tune your demon carb in your garage for improved engine performance. I believe it is a 750 but i am not too familiar with carbs. As previously discussed the metering rods and primary jets work together to meter fuel. Figure 1 installation checking the baseline adjustments all baseline adjustments have been made at the factory during the final assembly stage of each.
Looking for some help tuning my demon carb. Demon carb running too rich at idle first you will need a vacuum gauge. If the engine runs rough and rich when idling or it emits black exhaust smoke. Behind the demon and to increase your knowledge of carburetion on a whole. I have a 650 speed demon runs awesome but slightly rich at idle. If i accelerate at a normal pace and at normal road speed it seems to be finei have only pulled a.
It also seems to starveor bog when i get in it heavy and it will blow black smoke id assume from the raw fuel. A lean step for steady state cruising and a rich step for power enrichment under heavy loads. The metering rods are a dual step design. Then remove the carb and adjust the primary throttle plates until the transfer slot is about square. Also some demon experts have suggested initial timing as high as 18 20 degrees to also help this condition. It will burn your eyes its so rich.
Then adjust the secondary throttle plates a about the same as the primaries maybe just opened a little more. First thing if you lower the float level so it is even with the lower edge of the sight glass itll reduce some of that rich at idle condition.
Gallery of Demon Carb Too Rich
