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Author Topic: Float pins  (Read 1565 times)

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tigger

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Float pins
« on: January 24, 2008, 05:28:44 PM »
 I've searched the forum and found some hits.  And I've tried the suggestions without much luck.

 Situation - 77 CB550F carbs with 2 float pins stuck.

 Tried - soak in 50% Simple Green
           sprayed multiple times with PB Blaster
           tapped ( gently ) with small screw driver

 What other options are there, short of finding another set of carbs? 
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Offline KRONUS0100

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Re: Float pins
« Reply #1 on: January 24, 2008, 05:37:00 PM »
BE VERY CAREFUL.........use a small butane pencil torch........hold about 4-6 inches away and aim for the aluminum holders..they will heat faster than the brass and expand as suck...tap pins out while still hot.  Clean everything up with krokus cloth  when cool. Only do this as a last resort........I have only done this once....only to find i had to replace the carb itself.  This will work...but be very careful.   Matt
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MATT
current bikes:  1976 CB750F, 1981 GS1100E
bikes owned:1981 GL1100I, 1990 GS500E, 1981 GS850, 1977 and 1979 GS750, 1974 CB750, 1975 CB750, and a 1982 GS750E

tigger

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Re: Float pins
« Reply #2 on: January 24, 2008, 05:48:03 PM »
Did you have to replace the carbs because of the heat or for some other reason?
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Offline mrblasty

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Re: Float pins
« Reply #3 on: January 24, 2008, 05:59:07 PM »
I'm sure I will get flamed for saying this but here goes, I'm not a big fan of PB blaster, I have used one can of the stuff and with it ended up using a can of
WD-40 with it to loosen stuck bits.  I would look for a can of rost off(the spelling is correct) its made by wurth(again the spelling is correct) that stuff will kick WD-40 in the ass.  And go easy on the float pin post the break real easy.
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Bob550four

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Re: Float pins
« Reply #4 on: January 24, 2008, 06:14:18 PM »
I take a small nail, and a hammer and VERY GENTLY tap the pin out. you have to be careful though.   

I've done this on my carburetors with success.
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Offline Gordon

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Re: Float pins
« Reply #5 on: January 24, 2008, 06:15:47 PM »
Take a look at this thread on penetrating oils:

http://forums.sohc4.net/index.php?topic=20131.0
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Offline 736cc

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Re: Float pins
« Reply #6 on: January 24, 2008, 06:58:09 PM »
  Use another float pin, and tap it gently from the OTHER side. Smooth the pins w/ emery or a small file, the ends are soft and deform if squeezed w/ a needle pliers etc.
« Last Edit: January 24, 2008, 07:00:24 PM by 736cc »
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newcbguy

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Re: Float pins
« Reply #7 on: January 24, 2008, 07:55:01 PM »
I have found that an old brass slide needle from a carb works very well for a soft punch, and works good to remove the stuck float pins as well. It will bend before you damage your carbs which provides a safety net for us heavy handed folks.
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Offline KRONUS0100

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Re: Float pins
« Reply #8 on: January 25, 2008, 07:34:51 AM »
had to replace the carb due to cracking the tower the main jet sits in....could've been due to the heat or the jet was really stuck.......tried the heat on it as well........this was the only one that didn't work...the other 3 were fine afterwards.
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MATT
current bikes:  1976 CB750F, 1981 GS1100E
bikes owned:1981 GL1100I, 1990 GS500E, 1981 GS850, 1977 and 1979 GS750, 1974 CB750, 1975 CB750, and a 1982 GS750E

Offline Jim F

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Re: Float pins
« Reply #9 on: January 25, 2008, 05:38:10 PM »
If you happen to bust a post
sent it to me and I can laser weld it for you

Here is my web site if you need help
www.jmfmicroweld.com

Just be careful when you tapping out the float pins and you will be fine

Big-jim

Here are some pics of some repairs that I have done

« Last Edit: January 25, 2008, 06:07:47 PM by big-jim »
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Offline Gin Rickey

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Re: Float pins
« Reply #10 on: February 04, 2008, 02:38:55 PM »
I would say this: whatever you do, do not break the posts.  If leaving it to soak in carb cleaner for a little while longer will help dissolve the varnish...better to be patient.  Breaking a post after all the time you put into gently trying to prod those pins out is just an awful feeling.
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Offline BobbyR

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Re: Float pins
« Reply #11 on: February 04, 2008, 03:57:03 PM »
You could run a soldering iron over the posts to heat the aluminum and see if expands the hole enough to help loosen the pin.
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Offline Hinz

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Re: Float pins
« Reply #12 on: January 28, 2009, 06:51:21 AM »
what if your carb looks like this....

and this happens when you go to remove the float....

Think it's savable?
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Has learned so far that..."complete" gaskets are never complete no matter where you get them, VHT Silver Case Paint is just as durable as painting your motor with chalk and cheap tire irons used with rim protectors are useless on 30 year old tires.

Offline moham

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Re: Float pins
« Reply #13 on: January 28, 2009, 07:06:29 AM »
All Hail Kroil. Use a small drill bit as a punch, if nothing else is handy.
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Offline tygrant

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Re: Float pins
« Reply #14 on: January 28, 2009, 07:09:17 AM »
jesus i thought my carbs were bad. those are probably the worse i have seen :o
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Offline Duke McDukiedook

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Re: Float pins
« Reply #15 on: January 28, 2009, 10:03:01 AM »
Holy crap! That look like a hot fudge carb sundae...mmmm... sundae.
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