carb adjustments

hey all. i've got a 1981 xj550 just got to idle after 2 years of sitting.cleaned carbs and all,but when you go to give it throttle it stumbles.also at mid and high range.it has aftermarket filters and exhaust.do i have to adjust my needles?i don't think it has a jet kit in it.how do i adjust the mixture also,the plugs are foulng on cyl 1 and wet on 4.

 

Generally speaking:

If you are running Pod Filters you should be running LEAN.

But since you have a couple that are Fouling Wet ... I'd say you have a problem with the Emulsion Tubes being a trifle clogged. You are drawing-up FUEL ... but NOT enough Air being blasted at the stream coming-up out of the Main Jet.

The Fuel enters the Combustion Chamber closer to a stream than a mist. Hard to get that stuff lighted-up by a spark plug under those circumstances.

 

hey there. i cleaned them with wire just like the pic.you can see light through them.all the jets are clear to see through.and all the ports. anymore hints?

 

Did you blow-out the Main AIR Jet and the Passage that feeds Air to the void surrounding this Nozzle when its inserted in the Carb?

Anything blocking or covering the Main Air Jets?

 

yeah, just cleaning the emulsion tubes is not enough. There are passages that draw the air to the tube's holes. Those passages have to be cleaned out too. I used compressed air and blew out the passages on mine this weekend. I found some old pilot screw o-ring pieces came out the pilot passages...could have been part of the issue with my lean condition I was seeing as no matter how far I turned out the pilot screws the plugs still came out clean... We shall see when my new o-rings and washers arrive.