Need help with carb rebuild..

i just rebuilt my carbs on my 1986 maxim x Xj700. I have them on the bike but every time I start the bike it revs up and I can't get it to idle down. The idle screw is all the way out and choke is off. Any help would be great full appreciated.

 

Is there any chance you have a leak in the intake? Extra air can cause revs to surge. You can check with an unlit propane torch. Open the valve and hold the nozzle near intake boots and carbs. If revs increase, you've got a leak.
Also, the idle screw is supposed to be 2.5 turns out as a base setting.

 

Throttle cable pivot could be hung up on the cylinder fins. Choke plunger may not be closing all the way. And most probably, the engine hasn't been synched (running, vac synch) which can cause all sorts of odd issues.........

 

I have the same bike. Make sure your bench sync is good and that the idle screw is midway when you get it sync'ed. That will give you plenty of room to adjust. Like mentioned above, if the enrichment circuit isn't closing completely it will rev.

 

Replaced the rubber boots at the air filter. I can't even get the bike to run long enough to do anything. It immediately revs to 600 rpm

 

Please check the # 3 carb nut is not to tight back off a half turn , it might keep it from closing like it should . You might have to pull carbs use a buissness card under butter fly adjust synch screws till you get a slight drag. Hold up to a light source you should see a little bit of light.

 

It's the ones between the carb and the head that can cause problems.
Did you replace the throttle shaft seals?

 

Replaced the o rings at head. Can anyone tell me what all the jets are suppose to be set at. See two pictures and then main jet

 

All jets just get screwed into place. They are not meant to be adjusted, and will just shake loose if you try to set them to anything other than fully screwed in.
The only adjustable metering device is the idle mixture screw. Any other fuel metering changes require changing to different size jets and/or shimming the needle jet; none of which is required on a stock machine.

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Even with changing the intake boot o-rings there can still sometimes be a vacuum leak there. Check with carb cleaner when the engine is running. A vacuum leak will show up as an increase in engine speed.

 

The jets in the pictures you posted are the air compensator jets and they are size 36. They are just screwed down snug. From what I read, nobody is really certain what those jets do. I'm pretty sure those aren't causing you any problems. Their openings are really large. Just spray carb cleaner through there...should be fine.

 

They regulate the air to the float bowl. Without them, air can enter too fast and cause the fuel mix to be off, and possibly cause the floats to not meter correctly. They do not directly alter the A/F ratio however.

 

Is there a link for bench syncing? I'm not totally understanding because its on a rail and all work together correct? Maybe a link and an explanation? Tia

 

Here you go.

http://xjbikes.com/forums/threads/how-to-bench-synch-your-carbs.6366/