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Author Topic: 74 550 Carb Question  (Read 1991 times)

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Offline wedoo2

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74 550 Carb Question
« on: December 12, 2011, 06:35:33 PM »
Could someone please look at how I have assembled the top of my carb.  The manual does not explain this arm that goes into the throttle.  Are all of my pieces right?

Also the plastic washer with the rim goes into the carb body with the small spring holding it tight (so to speak)  Will that keep it from leaking gas?  Next time I will leave one of the carbs intact just for this problem.  My first time putting this together.  Where does that other plastic washer go?



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Offline luap

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Re: 74 550 Carb Question
« Reply #1 on: December 12, 2011, 09:05:05 PM »
what you have labled in the bottom right corner plastic washer goes inside the carb on that arm
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Offline Dimitri13

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Re: 74 550 Carb Question
« Reply #2 on: December 12, 2011, 09:35:55 PM »
There should also be a felt washer/gasket between plastic washer with lip and the carb body.

That plastic washer really isn't meant to keep gas from leaking out (if there would be a significant amount of gas up there, enough to leak, you probably have a problem. It's there to keep stuff from getting in.
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Offline Deltarider

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Re: 74 550 Carb Question
« Reply #3 on: December 13, 2011, 12:34:27 AM »
Why o why are you all separating your carbs?!
What's the point? In over 30 years and over 130.000 kms I never needed to separate them.
Why do you?
All jets and passages can be cleaned after removing the float bowls, adjusting the needles (if you really must) can be done after removing the top lids. But separating carbs from each other? What for?
« Last Edit: December 13, 2011, 12:48:27 AM by Deltarider »
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Offline Lars

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Re: 74 550 Carb Question
« Reply #4 on: December 13, 2011, 01:49:43 AM »
You separate them for cleaning the carb houses....
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Offline wedoo2

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Re: 74 550 Carb Question
« Reply #5 on: December 13, 2011, 02:10:56 AM »
Quote from: Deltarider on December 13, 2011, 12:34:27 AM
Why o why are you all separating your carbs?!
What's the point? In over 30 years and over 130.000 kms I never needed to separate them.
Why do you?
All jets and passages can be cleaned after removing the float bowls, adjusting the needles (if you really must) can be done after removing the top lids. But separating carbs from each other? What for?

Thing is, I didn't know that.  I had never taken one of these apart, and for that matter, never took any of the Honda carburetors apart.  I have changed the jets and needles before on the CV units, and sprayed them in and out.  Thing is the bike has sat for 15-20 years and I had no idea what shape it was in.  Turns out, pretty good.

I read horror stories here on the forum of guys putting things back together and they still leak,or run crappy.  I dread putting the entire thing back on the motor cause it is a PIA and I don't want to do it twice.  So, I decided to go piece by piece.

Then I have to ask all of these questions because the Clymers that I have, and the service manual I  picked up here, only gives me a partial breakdown, and re-assemble instructions.  And the printed diagram is very difficult on my old eyes, and not complete.

Two things:  I'm never going to take the entire body apart on all four, save one for a template.  Secondly, I'm going to document every step, with pictures, for the next guy dumb enough to do this, and post it.
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Offline wedoo2

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Re: 74 550 Carb Question
« Reply #6 on: December 13, 2011, 02:55:56 AM »
Thanks for help in the reassemble guys.  Got to find felt washers now.  Have no idea where I put those.  Maybe the local dealer has some.  Now to figure out the adjuster thingy on the outside of the carb body.
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Offline Danno

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Re: 74 550 Carb Question
« Reply #7 on: December 13, 2011, 11:01:40 AM »
the manuals are available in pdf form here on the forum just do a search
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Offline CoachDoc

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Re: 74 550 Carb Question
« Reply #8 on: December 14, 2011, 10:09:59 AM »
I've never been brave enough to separate the bodies. The thing that would require doing it (cosmetics aside) would be leaking o rings on the common fuel line connectors.  Hope you can get them back together ok.
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