I was wanting to know some things about the components of a carburetor. I was wondering what was the purpose of the main jet, pilot jet and needle. Thanks

 

the pilot jet is for low end up 1/4 throttle
the main jet is for wide open throttle
and the needle is for everything in between

 

dismantling shines some lights on what does what. make sure you either know what is what or have a maual before u dive in head first, but it does help knowing what's going on in there. [img]i/expressions/face-icon-small-smile.gif[/img] bring your imagination.

 

I use this page to refresh my memory whenever I'm adjusting my carburetor...

http://www.yellowdogracing.com/techstuff.htm

Hope it helps.

Good luck!

 

i dont know if this helps, but i keep my old spark plugs, date the bag, and mods i had on the bike at the time.

 

Thanks PiloTSniper. But what his the needle jet? I knew about the main jet and the pilot jet but the needle jet?

 

You don't really need to mess with the needle jet. That's the "cylindrical brass passage located directly above the main jet". It's the part that the jet needle (the needle on the bottom of the slide with the 5 c-clip positions) goes into before getting to the main jet. Pretend you never read about it and it will all get easier to understand. [img]i/expressions/face-icon-small-smile.gif[/img]

Good luck!

 

Hehe, I've got many things to learn with a carb. I thought that the "cylindrical brass passage located directly above the main jet" was the pilot jet [img]i/expressions/face-icon-small-blush.gif[/img] . In that case, where is the pilot jet?

 

It's located in another area of the carburetor (dependent upon the carb), accessible by removing the float bowl. It sounds like you would be better off jumping in head first and opening up your carburetor. This way, you could see what you're dealing with. Get yourself a rebuild kit and go to town on it. This will definitely get you on your way. It's not difficult! Just be patient, follow directions and don't strip anything! Some of these carbs have "butter screws", named this way because they melt quickly if you treat them the wrong way.

Here's a shot of my rebuild on a Keihin carb for my FL250 Odyssey...

Carburetor Rebuild

By the way, the pilot jet in the pic is the lower one.

Good luck!

 

Thanks again pilotsniper [img]i/expressions/face-icon-small-smile.gif[/img]