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Author Topic: Broken float pin holder in my new bike  (Read 1109 times)

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Offline mattlavoie

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Broken float pin holder in my new bike
« on: November 11, 2013, 04:49:29 PM »
I just bought a 1977 CB550F Super Sport. I drove it before I bought it, sounded fine for being a cold day. Brought it home and I couldn't get it to idle with the choke closed more than 95% so I thought the carbs must be dirty even though he said a shop cleaned them 8 months ago. It's been sitting since then so I figured dirty gas had clogged them up again. The more I ran it the worse it sounded. Sounded really weird and weak at low RPMs and after a while it would barely respond to revving and die.

I take the carbs apart and they are super clean inside except for the #4 carb, it has gunk around the cast metal parts that hold the float pin in place. I pull the pin out and they fall off. Looks like the gunk is glue. It was standing up when I took the pin out, so I think the float was working ok before, but maybe the glue came apart and got sucked through the engine?

How much of the engine do you think I need to clean? Is there any way to patch this cheaply or do I need to buy a new #4 carb or set of 4?
Thanks very much, I'm really disappointed my first bike was a scam.
Close up images: http://imgur.com/a/niBJV

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1977 CB550F Super Sport

Offline MoMo

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Re: Broken float pin holder in my new bike
« Reply #1 on: November 11, 2013, 04:59:40 PM »
Forum member harisluv may have a body.   Microwelding may work, if you do not have anyone locally, forum member Jim French in GA offers the service.  You can post in the bike and parts wanted for a body wanted...larry
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Offline Hannibal Smith

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Re: Broken float pin holder in my new bike
« Reply #2 on: November 11, 2013, 05:10:48 PM »
I don't think you have to worry about anything getting sucked into the motor.

I would just get another carb body.
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Offline Vinhead1957

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Re: Broken float pin holder in my new bike
« Reply #3 on: November 11, 2013, 05:45:34 PM »
Yup new carb body, but that looks like JB weld!   
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Offline mattlavoie

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Re: Broken float pin holder in my new bike
« Reply #4 on: November 11, 2013, 07:53:53 PM »
Awesome, thanks everyone! So I'll replace that one carb and hope the rest of the engine is ok. I guess it'll need to be synced after that too.

Do you know if the 550k uses the same carbs as the 550f?  This carb is pretty cheap on eBay,and I would transplant my parts into it.
http://www.ebay.com/itm/231090945505?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
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1977 CB550F Super Sport

Offline brewsky

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Re: Broken float pin holder in my new bike
« Reply #5 on: November 12, 2013, 04:33:29 AM »
Quote from: mattlavoie on November 11, 2013, 07:53:53 PM
Awesome, thanks everyone! So I'll replace that one carb and hope the rest of the engine is ok. I guess it'll need to be synced after that too.

Do you know if the 550k uses the same carbs as the 550f?  This carb is pretty cheap on eBay,and I would transplant my parts into it.
[url=http://www.ebay.com/itm/231090945505?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649]http://www.ebay.com/itm/231090945505?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649[/URL]
That carb will not work with yours.
There is a casting number on the carb and you should match any replacement with the same number. (probably 069A)

As stated above, check with Harisuluv for parts
http://forums.sohc4.net/index.php?topic=105640.0
« Last Edit: November 12, 2013, 04:42:22 AM by brewsky »
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Offline mattlavoie

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Re: Broken float pin holder in my new bike
« Reply #6 on: December 03, 2013, 04:53:46 PM »
RESOLVED!
I mailed my entire carb set to Jim French to have him weld it back together - $25 per post plus shipping. I got them back and installed them and the bike runs great now! Thanks for the advice guys.
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1977 CB550F Super Sport

Offline MoMo

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Re: Broken float pin holder in my new bike
« Reply #7 on: December 03, 2013, 05:03:14 PM »
Awesome job he did and at more than a fair price-looks good...Larry
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Offline mattlavoie

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Re: Broken float pin holder in my new bike
« Reply #8 on: December 03, 2013, 05:05:28 PM »
It was especially hard to weld with jbweld residue stuck in the pits of the broken surfaces! I'm really happy with his customer service, if I ever have a problem with them I know he'll have my back.

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1977 CB550F Super Sport

Offline Bailgang

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Re: Broken float pin holder in my new bike
« Reply #9 on: December 03, 2013, 05:07:41 PM »
Quote from: MoMo on December 03, 2013, 05:03:14 PM
Awesome job he did and at more than a fair price-looks good...Larry
+1
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71 cb350 twin
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