How does the jet needle affect the range?
The opposite holds true for a richer mixture. 1/4 to 3/4 THROTTLE: The JET NEEDLE is the most effective component in this range. Raising the needle by lowering the “E” clip position at the top of the needle will richen the mixture. Lowering the needle will lean the mixture. WIDE-OPEN THROTTLE: Changing the MAIN JET affects this range.
What to consider before ordering a rejetting jet?
Confirm jet dimensions before ordering. The first thing to consider before rejetting is get all jets from 1 place that is strict about the quality of their jets. Our goal is consistent jetting results. All our jets have been manufactured in the same plants since we opened.
Can a pilot slide be substituted for a jetting slide?
If the Air Jet or Pilot Jet does not clean up this part of the circuit, the slide can be substituted for one with a different cutaway (not recommended).
What’s the needle clip on a jetting engine?
Needle “E” clip position – This works in conjunction with the length of the straight section. If the engine is too rich above 1/4 throttle, raising the needle “E” clip (effectively lowering it into the nozzle) will lean the mixture.
What happens if you change the jet needle?
If it doesn’t, you’ll need to reestablish the main jet to its original position and then move on to the jet needle and so on. If you change all three you’ll never know what jet posed the air/fuel mixture problem, you’ll overcompensate to lean and create a bigger puzzle then necessary.
Confirm jet dimensions before ordering. The first thing to consider before rejetting is get all jets from 1 place that is strict about the quality of their jets. Our goal is consistent jetting results. All our jets have been manufactured in the same plants since we opened.
What do you need to drill main jet?
You will need a vice with jaws that will hold the main jet perpendicular to the drill bit. You do not want the drill bit to enter the main jet at an angle because it could create an oblong hole in your jet. Once you drill the main jet to a size that gives you a good plug reading you can use the chart below to determine what size the jet is.
Needle “E” clip position – This works in conjunction with the length of the straight section. If the engine is too rich above 1/4 throttle, raising the needle “E” clip (effectively lowering it into the nozzle) will lean the mixture.
