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Leaky carbs

Fuel System: Gas (Petrol) tanks, Carburators
Jlovvorn
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Leaky carbs

Post by Jlovvorn » Fri Feb 10, 2012 3:02 pm

Before you say "check your float level" please know that I read the ENTIRE long thread on this, and double checked both the LM eyeball method and the Silver 22.5mm and am 99% certain the float level is correct.

So, what other ideas do you have?

The gasket looks ok, and the bowl is closing tight with the swing arm.

It's a slow drip, but not a torrent, and it doesn't drip when running. Idling yes, running no.

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davomoto
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Post by davomoto » Fri Feb 10, 2012 6:03 pm

The brass tube that runs up from the bottom of the float bowl may have a crack in it. Remove the bowl from the bike, fill it with fuel, and see if it drips.

Davo

Jlovvorn
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Post by Jlovvorn » Fri Feb 10, 2012 7:59 pm

Did that, and its sound.

I shouldn't have done it, but I tweaked the tangs just a tiny bit down, put the bowls back on and now I just have a little seepage if the bike is parked and not running with the petcock on.

I think I can live with it as is, as I took if for a spin and my hesitation problem is gone.

At idle and running, there is no dripping. Parked with petcock off, nothing but some moisture. Parked with petcock on is trouble.

I think I found a compromise by tweaking the float level. Hope I don't end up too lean or something.

PS For anyone familiar with my "Give me a reason not to quit" posting, it looks like a sticking slide, needles on the wrong setting, and some clogged inline filters were the root of the problem with starting and hesitation.

Starts on 3-5 kicks at 40 degrees now, idles around 1,500 smooth, and runs without hesitation or restriction.

Got the cam oil seal in hand - changing it tomorrow as soon as I get the stripped screw off the points cover.

Thanks again to everyone that sent advice and encouragement.

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davomoto
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Post by davomoto » Fri Feb 10, 2012 8:41 pm

Happy to hear you're keeping at it!

Davo

Jlovvorn
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Joined: Tue Dec 27, 2011 11:10 am
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Post by Jlovvorn » Fri Feb 10, 2012 9:01 pm

I'm addicted. You all are enablers...

Can't wait to get out to the garage tomorrow morning.

Mike Mullins
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re: addicted

Post by Mike Mullins » Fri Feb 10, 2012 11:28 pm

If you think you've got the addiction bad and we are all enablers, just wait till it warms up.
I just bought another CB 77 yesterday- my wife informed me today that there will be no more bikes in the basement. (There are 6 down there now, but 2 of them dont count since they are my son's and his girlfriends.)
Mikeyrx
"a free motorcycle is a bottomless hole intended solely for money"
66 CB 77
76 BMW R75/6
99 GL 1500 trike
75 & 79 XS 650's

ironangel
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Post by ironangel » Sat Feb 11, 2012 4:46 am

On your fuel leak, have you considered checking the float shut off valve (needle valve) for dirt or damaged tip....jk

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