DISHO1
08-24-2001, 10:31 PM
curtis sparks does a carb mod to the 400ex carb. i asked them what they did to the carb and they said the throttle butterfly valve is removed , but i removed the valve on mine and it idle way too fast. the idle adjustment did not do anything to slow it.
on a cv carb the throttle cable moves the throttle butterfly valve and air pressure moves the slide up or down
on a " flat slide" carb the throttle cable moves the slide and there is no butterfly valve
the valve is the restriction on a cv and the slide is the restriction on a "flat slide". that restricts how much air gets by on both carbs and controls idle somewhat.
on the 400ex carb the throttle cable moves both the valve and slide together.
the question is what does sparks do to the carb to get the idle back to where is should be if they remove the throttle butterfly valve?
or do they even remove the throttle butterfly valve?
on a cv carb the throttle cable moves the throttle butterfly valve and air pressure moves the slide up or down
on a " flat slide" carb the throttle cable moves the slide and there is no butterfly valve
the valve is the restriction on a cv and the slide is the restriction on a "flat slide". that restricts how much air gets by on both carbs and controls idle somewhat.
on the 400ex carb the throttle cable moves both the valve and slide together.
the question is what does sparks do to the carb to get the idle back to where is should be if they remove the throttle butterfly valve?
or do they even remove the throttle butterfly valve?