Initial Metering Rod Setting

The best way to achieve initial setting is to use a fuel ratio tool, this tool will actually measure the taper of the metering rod at an idle position. The fuel ratio tool is available for purchase please contact Fast By Gast. If you do not have the fuel ratio tool you can achieve an initial setting using a set of veneer calipers to measure from the tip of the rod to the brass insert in the slide.

  Note: Flat Side of Metering Rod Must Always Face in Towards Engine

            The metering rod that is supplied with your carburetor is recommended for a standard serial production version on your engine, in its normal state of tune. Any variations of tuning beyond the way that your engine was manufactured and subsequently maintained will effect the recommended selection and or setting of the metering rod.

          For fine LOW END tuning, turn the metering rod in direction of Arrow "A" (richer) or "B" (leaner) as shown in FIG. 2 and rotate until flat side of rod is in position as shown.