easy way to test the pilot jet?

[mattb348]

Can you test the pilot jet by listening to how fast the banshee idles, based on how far in or out the air screw is turned?

 

With a motocross dirtbike you can do this; if it idles at its fastest with the air screw turned out 2.5 turns or more, then you need a bigger (richer) pilot jet. If it idles at its fastest with the air screw like half a turn in, then you need a smaller (leaner) pilot jet. By defualt the bike I have has the air screw turned 1.5 turns out, and I beleive the banshee is 2 turns out by defualt.

 

Also, how do you do the ride and feel method with a banshee to set the air screw at optimal? Do you just put it in 1st, and give it a quick throttle snap from idle too 1/4 throttle, and turn the air screw to the point that gives best throttle response?

[Yaxy]

Your logic sounds correct. To lean of a pilot creates a fast idle and typically poor throttle response. To rich of a pilot and you foul plugs. Set your air screw to the recommended two turns out. Get the bike up to normal operatign temperature put the bike in 1st or 2nd chug it and lay on the gas. If it bogs turn in your air screws until bog goes away. If you find out that it is better when the air screws are turned in all the way then you need to go to a larger pilot.

 

Also the 2 turns out is a rule of thumb. I run mine at 1/2 to 1 turn out and no problems.

 

Chris

[JA66]

if it idles at its fastest with the air screw turned out 2.5 turns or more, then you need a bigger (richer) pilot jet.

427153[/snapback]

When you turn out the air screw, you're giving the engine more air, so if it idles fastest at more than 2.5 turns out, the engine wants a leaner mixture (smaller pilot jet). Stock setting is 2 turns.

Check out this page. http://www.duncanracing.com/techfaq/Tech_k...n-jetting.phtml

Edited October 29, 2005 by JA66