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Author Topic: CB350F emulsion tubes  (Read 1144 times)

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Offline jsat

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CB350F emulsion tubes
« on: July 06, 2015, 05:12:05 PM »
Hey,

Another project. Really old carb set. Emulsifier stuck. 2 questions:

1) is there a way to deal with a stuck emulsion tube? I've poured boiling water, carb cleaner repeatedly, over many days. So I assume the next step is to take the needle out--

2) with this particular one is there a trick to bending the tabs that secure the link arms (inside the top carb cover); I just can't figure it out, other than some needle-nose pliers (which of course can't find any of mine anywhere)?

Thanks!

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Offline harisuluv

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Re: CB350F emulsion tubes
« Reply #1 on: July 06, 2015, 08:01:59 PM »
The emulsion tube doesn't screw out, it just slides in/out.  However, that's with clean carbs. 
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Offline jsat

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Re: CB350F emulsion tubes
« Reply #2 on: July 06, 2015, 10:57:21 PM »
Right, I know that as well, having them in an easier, cleaner carb previously. Just wondering what other tricks there are to get them out.

Thanks!
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Offline flybox1

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Re: CB350F emulsion tubes
« Reply #3 on: July 06, 2015, 11:08:04 PM »
Take out the slide and needle, and press out the tube from the top using a wood Dowell.
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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Offline camelman

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Re: CB350F emulsion tubes
« Reply #4 on: July 07, 2015, 12:12:30 AM »
What Flybox1 said. If you can't get the top disassembled, then I've had success using an allen wrench inserted about 1/4" into the emulsifier tube and levered over to "catch" in the tube as you pull out. I wouldn't put too much force on the tube doing that though. Best method is what Flybox1 mentioned.
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Offline ADW

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Re: CB350F emulsion tubes
« Reply #5 on: July 07, 2015, 04:12:26 AM »
Quote from: camelman on July 07, 2015, 12:12:30 AM
What Flybox1 said. If you can't get the top disassembled, then I've had success using an allen wrench inserted about 1/4" into the emulsifier tube and levered over to "catch" in the tube as you pull out. I wouldn't put too much force on the tube doing that though. Best method is what Flybox1 mentioned.

I'd be super-super careful with this technique. One of the emulsion tubes on my 350F was bent and they're nearly unobtanium these days. Once bent the needle will never seat/position right in the jet again, so I'd avoid this technique. As camel said, Flybox's method of pushing out from the top with a wooden dowel is the way to go. Just keeping working that until it works.
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Offline jsat

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Re: CB350F emulsion tubes
« Reply #6 on: July 07, 2015, 07:38:02 AM »
Great, what's the "right" way to bend the tabs?

thanks!
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Offline HondanutRider

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Re: CB350F emulsion tubes
« Reply #7 on: July 07, 2015, 03:42:03 PM »
One way to free stuck carb components is to use some heat from a heat gun or even a hair drier.
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Offline ADW

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Re: CB350F emulsion tubes
« Reply #8 on: July 08, 2015, 05:14:09 AM »
Quote from: jsat on July 07, 2015, 07:38:02 AM
Great, what's the "right" way to bend the tabs?

thanks!

Use a pretty small flat-blade screwdriver. Get it between the bolt head and the tab and pry the tab out a bit. The tabs don't have to lay completely flat to get a socket on the bolt, you just need to bend them away a bit. Nothin' to it.
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Offline 1stgenxxx

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Re: CB350F emulsion tubes
« Reply #9 on: July 08, 2015, 05:28:02 AM »
heat! and pb blaster
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