Topic: Needing Help With Carb Jet Removal

[Burke]

I have a 78' CB750K, and am cleaning the carbs, which these have been sitting for some time and plenty of varnish. Anyway I cleaned the bows (simple green is awesome) but I cannot get the slow jet out. If anyone is familar with these they know that these do not have a "Screw", so I am not sure how to remove them or if they can be removed. Same with the valve set (float).

Also I notice that I am not getting gas into the #4 carb, Where would I look for this blockage? In the small line from #3?

 

[Burke]

Thanks, I just wanted to make sure that they do indeed come out.
Could I use Liquid Wrench or PB Blaster to try to loosen them up, or would would those be a bad thing to use on carbs in this situation?

[my78k]

No need for the lube (lol...not something I would normally say!)...all I do when removing mine is use a very thin rag and a set of vise grips (not too tight). The rag keeps them from getting scored. A light twist and pull and they should come out...

Dennis

[Burke]

An old biker at work today told me that I could take a sodering iron and lightly heat the aluminum boss around the brass jet and this may help in removal by expanding the aluminum, but not to overheat cause then the brass would expand as well.

[mick750F]

An old biker at work today told me that I could take a sodering iron and lightly heat the aluminum boss around the brass jet and this may help in removal by expanding the aluminum, but not to overheat cause then the brass would expand as well.

   
   There is no need for that at all. The described method works well. I'll add that I use a piece of leather between the pliers and the jet to prevent scoring. You'll want to soak the jets in a good cleaner, Yamaha Carb Cleaner works well, and you may have to do some reaming with copper wire. Don't use anything harder than copper or you run the risk of enlarging the orifices. Compressed air is also your friend for cleaning carbs in general.

Mike

[upperlake04]

 Good advice all - just pull straight out. They might be stuck initially but once loose they come out easily as they only contact the carb body on the shoulder. Tap back in when all the orfices are clean as well as the channels they connect with in the carb body. Spray carb cleaner and/or compressed air works well to ensure all passageways are clear. Pic from the archives.

[Burke]

Thanks for the pics, and I have removed them. I should be able to see all the way through them correct???
Cause right now, I cant.

[BobbyR]

Since I have a 78K which is an excellent choice , and started the Simple Green movement, I have done this a few times over the years.
Use a good plier and use a twisting motion with a bit of a wiggle will pull them right out. If you use a vise grip go easy so you don't deform them. A scratch on the outside really will have no effect on them.  You will find what you see in the above pictures, holes  in the sides and of course one in the middle. You will probably find white deposits in the side holes which Hondaman attributes to the MBTE and other junk they dump in the gas. Use a thin wire to reopen those holes, then you can blow out any particles with PB or whatever you have at hand. You are washing more than dissolving. Just tap them back in gently until they seat and you are ready to roll.   

[Burke]

Thanks everyone.
I got'em out and clean.