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Why not to epoxy your carbs back together

  • Thread starter Thread starter tcraft128
  • Start date Start date
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tcraft128

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See....dont epoxy your carbs together. It was dangling when I removed the bowl. Looks like the PO put a screw in the post, so at least they tried.

So needless to say, I need a set or just carb number one ASAP!!!
1980 gs 550e CV's.

If you have one and would part with it, I dont care what it takes, I need it yesterday.

Never underestimate the ability of the PO.
 
could this part not be soldered into place?
one wonders
anyone here ever solder or braze a broken post like this?
 
It's worth a shot. All you've got to lose is a little time.
 
That MIGHT work, but I would rather just get a new one....Got any to sell?
 
Solder

Solder

I don't think you can solder it because of the heat dispersion. You can't weld it because of the high zinc content in the aluminum (which makes them very easy to machine). I'm not an expert on either (by a long shot) but I'm basing this comment on information I got from a guy who owns a machine shop and does a whole lot of work on bikes.
 
chuckycheese said:
I don't think you can solder it because of the heat dispersion. You can't weld it because of the high zinc content in the aluminum (which makes them very easy to machine). I'm not an expert on either (by a long shot) but I'm basing this comment on information I got from a guy who owns a machine shop and does a whole lot of work on bikes.
Click to expand...

you would have to be realy realy realy good, low grade pot metal is hard to work with.
 
you'd be better off trying to epoxy it back together!!!!!

ahahahaahahhhahahah jk..
 
Use a marine grade epoxie. Or If you have access to a drill press you can drill both parts & tap for a 4-40 stud
 
Got a new carb body, thanks for the ideas on how to fix it...
 
The carbs can be welded; I successfully "rebuilt" a corner on my carb body where the float bowl mounts. The zinc content was not that high on my carbs - I spectro'ed a chunk & the alloy was very similar to AMS 4185 (high silicon content, fairly low zinc, < .8%) A4340 weld filler will work.

The PO had broken it off & I had the area built up with weld metal & subsequently machined back to the original configuration. However, since I work in an aerospace facility, I have access to a VERY good welder (the best I've seen), and several crack machinists who work for donuts!! I am lucky.

I would not recommend welding yours though, I would worry about the ID dimension of the needle valve bore. Perhaps the welding heat will distort it? Maybe not. I think getting a new body is your best bet - just be aware that not all bodies are the same, meaning you will most likely have to replace it with the same "number" carb (carb #1, #2, #3, or #4)
 
I am not an expert welder or really even a passable welder and I welded mine with a millermatic 210 with a aluminum gun. Tacked it as good as I could and filed it down so the float bowl would clear. I don't know how long it will last but the bike is running. The PO had epoxied mine too, and it had failed.
 
Thanks!

Thanks!

Fishman said:
I am not an expert welder or really even a passable welder and I welded mine with a millermatic 210 with a aluminum gun. Tacked it as good as I could and filed it down so the float bowl would clear. I don't know how long it will last but the bike is running. The PO had epoxied mine too, and it had failed.
Click to expand...

Well, I'm interested to hear that and I appreciate the information. I have a perfectly good set of carbs with one broken post so I may try to get someone to weld it for me. The break is 'perfect' so it fits together tightly so maybe it will work for me. Thanks! I'll report back what I'm able to find.:-D
 
chuckycheese said:
Well, I'm interested to hear that and I appreciate the information. I have a perfectly good set of carbs with one broken post so I may try to get someone to weld it for me. The break is 'perfect' so it fits together tightly so maybe it will work for me. Thanks! I'll report back what I'm able to find.:-D
Click to expand...

Mine have been running with one broken post for three years. I pulled the bowls off when I was changing the intake boots a couple years back. It was in the bottom of the bowl, looked like the PO tried to epoxy it.
I've had no problems. Don't sweat it.
 
?

?

8trackmind said:
Mine have been running with one broken post for three years. I pulled the bowls off when I was changing the intake boots a couple years back. It was in the bottom of the bowl, looked like the PO tried to epoxy it.
I've had no problems. Don't sweat it.
Click to expand...


So..............what did you do????
 
hikermikem said:
However, since I work in an aerospace facility, I have access to a VERY good welder (the best I've seen), and several crack machinists who work for donuts!! I am lucky.
Click to expand...
I have a #3 carb for an 850 with a broken post. What kind of donuts do they like? 8-[

.
 
chuckycheese said:
So..............what did you do????
Click to expand...

It runs, and has run with one post for at least three years. (maybe more because it may have been broken when I got the bike)
I think the reason I've gotten away with it is because it's broken at the very bottom of the post. With fuel in the bowl, the post in where it's supposed to be. If the post were broken completely off, it probably wouldn't work.
 
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