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pilot screw: air screw or fuel screw
- Thread starter niko
- Start date
Fuel screw. Turning it in all the way (clockwise, or right) closes it and reduces the fuel. Turning it out/loosening it/counter-clockwise/lefty-loosey richens the mixture at idle.
Do not turn them in (closed) too hard; they will break. When you feel some real resistance stop. Just a friendly fyi.
Good to see you posting Niko
Do not turn them in (closed) too hard; they will break. When you feel some real resistance stop. Just a friendly fyi.
Good to see you posting Niko
XSLeo
XS400 Junkie
bcware is partly right. The screw isn't really either, air or fuel. Air is drawn in through a vent in the carb bell. This air gets mixed with fuel at the pilot jet.
The pilot jet feeds this air fuel mix to three holes by the throttle plate. Two feed directly into the airstream, the third hole is controlled by the mix screw. This allows you to adjust one third of the idle mix that feeds to engine.
There is a vent that feeds air to the main jet too.
This is why some of the cheapy pod filters are a poor choice. They have a lip that can block off the vents either partially or fully.
Leo
The pilot jet feeds this air fuel mix to three holes by the throttle plate. Two feed directly into the airstream, the third hole is controlled by the mix screw. This allows you to adjust one third of the idle mix that feeds to engine.
There is a vent that feeds air to the main jet too.
This is why some of the cheapy pod filters are a poor choice. They have a lip that can block off the vents either partially or fully.
Leo
