Topic: Are these Carbs done for?

[Accorn]

I took my carbs off and found some surprising things in the float bowls. I noticed that there wasn't just varnish in them but there was also a white crusty build up. However on further inspection it appears that the white stuff was the result of the carburetor housing corroding from the inside out. One of the pictures below shows all the crap that fell out of them when I took the bowls off. The valve stems are eaten down and one of them even broke off at the top. I soaked the whole thing in simple green hoping to clean it up but no luck.

same thing happned in the petcock too.

I was hoping to restore this bike and get it running after a previous owner neglected it, but I think the carbs have to be scrapped. What do you all think? Is this from water in the gas?

[nccb]

good god, i thought the ones i was working on were bad

[72500john]

clean up what you got and see what can be salvaged...good god man those are bad. sorry to poop on your parade. looks like a bad case of intergranular corrosion.

[MoMo]

Look like the Slime That Swallowed The Honda Carb If the metal is eaten, as it appears to be, you most likely will be looking for new carbs. One of the worst I've seen Good luck with the repair...Larry

Post under the bikes and parts wanted, maybe someone has a set. Before you put anymore money into the bike check compression and do a leak down test if you have the capability...Larry

[cb550choppa]

ill give you 5 bucks for the jet clips

[Accorn]

I new something was bad when I pulled the bowl off and out came a pile of dust. And the fact that the top of the tower snapped off. Craigslist strikes again. The owner I bought it from sad it was running fine until he put bad gas in it and let it sit around for two years outside. I was hoping i could rescue it.

Do you think that this crap could have gotten in the engine? I didn't see any white stuff in the intake manifolds.

[Accorn]

Sorry I don't know what the "jet clips" are

[lone*X]

They are the bow shaped springs like the one in your middle picture.  Hang onto all your parts until you get a good set of carbs cleaned and working.  Never know what pieces may be missing from a replacement rack.

[fmctm1sw]

Those are as bad, if not worse, as the ones off my 550.

[faux fiddy]

.  Hang onto all your parts until you get a good set of carbs cleaned and working.  Never know what pieces may be missing from a replacement rack.

+1 They're probably junk, but they aren't garbage yet.

[cmonSTART]

Wow.  Those are really bad. 

[dave500]

stalactites and stalagmites normally take thousands and thousands of years to form but it can be done in a few years in carbs.

[Stev-o]

Get new carbs, you should be able to find a rack for $100 or less.

[messeduptriple]

good god, i thought the ones i was working on were bad

wow...me 2

Sent from my PC36100 using Tapatalk

[grasscutter]

And just think how long it takes to open the drain screws @ bottom of each bowl?

10sec total?

*shakes head*

[Tugboat]

Those leaf springs are impossible to find. HANG ON TO THEM!!

[lucky]

Clean them up THEN make a decision.
That white powder is aluminum chlorates. It is from dissimilar corrosion
between the brass parts and the aluminum.
The brass is more noble than the aluminum so the aluminum is wasting away.
They may still be salvageable and many parts may be salvageable.
Clean all of the parts FIRST and then decide what is useable.

When I look at the enlarged version of the photos they all look like they are salvageable.

[davis96]

Don't give up on 'em just yet, unless you've got money to burn.
Here's the mess I inherited and the result after many hours of cleaning:

[Tugboat]

^Wow! Nice!

[grcamna2]

Welcome  to the forum Accorn !

Blow 'em off and scrape off the loose stuff as much as you can,spray them down w/ PBBlaster...,disassemble them, put in an ultrasonic cleaner and see what's left to salvage.I think it's a good thing to pay special attention to how the jets and other brass pieces "slip-fit" into their respective holes in the aluminum carb bodies...if those "slip-fit" holes where the brass jets w/ o-rings fit into are badly corroded inside those little aluminum "bores" in the carb bodies..well,they wouldn't seal very well any more. I'm sure you'll be able to salvage a great number of things .

I wouldn't throw in the towel on those carbs(as lucky suggested )until you've cleaned 'em up.

[nccb]

did you put the floats in that carb dunk too Davis96?

[cb550choppa]

i have a clean set of carbs missing jet clips but other wise complete ill sell cheap quick cleanin and ready to go

[fastbroshi]

What mixture is this you used to clean them??

[Scott S]

Don't give up on 'em just yet, unless you've got money to burn.
Here's the mess I inherited and the result after many hours of cleaning:

 Hard to believe those are the same carbs! Tell me about the screens? How did you attach them inside the stock velocity stacks?

[ADW]

Am confused/concerned about the vent line "U turn" in the center of the stack in the photo of the clean/reassembled stack. Those two are the atmospheric vent lines on my CB350F carbs. They're spodabe two separate long vent tubes that end up hanging down behind the engine near the swingarm like the overflow lines do.

Is this carb set different for some reason? The way it's set up now the bowls will never fill with fuel because there's no outside venting to relieve the suction that will occur when the bowls begin to fill. Unless these are different and I'm missing something. These do appear to have 2 fuel feed lines (my 350F only has one) so maybe it's correct this way........