Emulsion tube removal:

Hi am cleaning the carbs on my '82 XJ650J, and need to remove both the mixture screws and emulsion tubes. I used the search function on the site, (quite useful), and know how to remove the main jet, then tap the tube from the bowl side. Does the jet go straight through toward the venturi, or is it removed from the bowl side?

The idle mixture screws don't have a cap on them, and are easy to access, however turning them counter-clockwise until out of the threads, they are still recessed slightly below the carb body. Tiny needle nose pliers? Thanks for any input!

 

With the carb slides removed they will push out, push from the float side of the carb and they come out on the slide side. I use a wood dowel rod so I don't dammage the emulsion tube.
The mixture screws turn them counter clockwise , they won't come all the way out. turn the carb over and tap it against your hand to get it the rest of the way. Try to avoid using metal tools to pull them out, you can easily dammage the threads. Be sure to get the spring, washer and o-ring out also. A small hook made from a saftey pin will help .

 

Thank you for the fast reply! The emulsion tubes pushed out easily, all but
one was completely clogged.

The mixture screws and springs removed easily, but no o-rings. No o-rings? They must have disintegrated over 30 years. I have a few o-ring kits, should they fit inside the carb body just on top of the shoulder, where the threads begin, or fit around the mixture screw, under the threads?

 

Those o-rings are very small, look again. They get stuck in there are are sometimes hard to get out. Holding the mixture needle by the threads, put on the spring, washer then o-ring. Put a little lube ( I like silicon grease)on the assembly and its ready to go back in after carb cleaning.

 

Clipper, the o-ring is small---about the size of this letter ' o ' and there is a very thin washer right above it.

Now, take another look down in the mixture screw bore. When you took the screw out you should have gotten the screw, spring, washer, and o-ring. More than likely, you got the washer, but no o-ring OR you got the screw and the spring only. Look inside and see if you see the washer. the o-ring is below that. If you can see the whole bore, the bottom of the bore, and the hole shoulder, then the o-ring is missing.

I use a wire from a guitar, that I mounted into a handle. It's about 2 inches long and has a very small hook bent on the end of it with a handle on the opposite end. I can slip the hook through the o-ring with a very slight pressure and I can feel it slip through. A slight twist, hook, and pull, and the o-ring pops onto the wire and I lift it right out.

Dave

 

If the tiny O-ring has been "Flattened-out"; you need to make a tool to fish it out.

Heat the tip of a Darning Needle
Once it red-hot, ... make a small hook on the end.
Quench the needle in water.

Use the Needle to reach-down into the Pilot Mixture hole and snag the O-ring.

Look for the tiny Flat Washer to be stuck to the O-ring.

 

I seem to remember you advocating the use of a dental pick in years gone by, suggesting that one could grab a used one the next time they were at the dentist. I never got around to doing that -- I just bought a set of picks from Harbor Freight.

 

I made an "O" ring removal pick by bending a "J" in the kind of wire that holds toys to the cardboard box.

Clipper - if your emulsion tubes were clogged, then you can bet that many other internal passages are plugged. Take your time and double-check that you cleared ALL passages.

 

Thank you all for the expert guidance! I completely disassembled each carb, jet, etc. I did locate the small washers and o-rings at the bottom of each mixture screw bore. I'm currently working the carb bowls, as the enrichen circuit was clear in just one of the bowls. Ordinarily a stiff piece of floral wire (.008") will do the trick, however whatever muck is stuck in the base intersecting the two holes is claiming the homestead act.

 

If you can find a can of carb dip, you could soak the bowls and/or bodies in that stuff for a day or three apiece.

Plus, if you haven't already, take a peek Inside Your Carbs -- might give you a better idea of how the passages are laid out.

 

A piece of .012 dulcimer wire will work, as well as a piece of .022w will work IF you use the bare end of the wire where the winding is not on it. If you use that, make sure that you file off the tiny burr that may be on the end. I use those as they are cutoff's from the instruments I build. That way, I have a 'lifetime' supply of various size wires, though predominantly .010's and .022w's.

Actually, thinking about it, if anyone needs a couple sections of these sizes, I'd be more than happy to send you some. I end up with three 10's and 1 22w from each instr., and then various other sizes when I get other instrument orders or repairs. Just pm me.........

Dave F

 

Getting the lower Fuel Bowl passage which feeds the Enrichment Well flowing might require some manual labor.
Hardened matter blocking the passage sometimes needs persuasion to break-up and allow Carb Cleaner to dissolve the crud in there.

Chuck a Small Drill Bit into a Dremel Universal Chuck and use it as an Auger to drill through the clog and let solvents flow through the passage to clean it out.

>>:: Dremel Universal Chuck and Drill Bit - Vacuum Hose Comfort-end ::<<

 

The bowls have been soaking in carb cleaner since Thursday, indeed stubborn. Using a drill bit as an auger looks like a good option, wire size
I would think, how small are we talking?

 

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