JB Weld

[Espiritus]

Hi, all! Still waiting for carb kit to arrive and STILL trying to get the broken point out. In my overly zealous, late night, frustrated "I AM going to get this out" frenzy I widened the hole. . .brass is still stuck in it, but it is noticably wider.

Yes, I tried all the tips and suggestions for removing it.

Anyway, on one of the threads, somewhere, there was a mention that JB Weld could be used to restore the proper size using a discarded idle screw, but in another thread (an old one) there was a mention that JB Weld doesn't hold well when immersed in gas. While I understand that it technically wouldn't be immersed in gas, what is the opinion of the group about using it in the carb?

Yes, I am going to be looking for a #1 carb to replace this one eventually, but not today!

Cam

[bikerphil]

jb

JB weld seems to hold up in gas pretty well. You should be able to repair the float posts with that.

[prometheus578]

Well... who knows for certain?
The technique is to patch the hole with JBweld and then a new pilot screw(well greased so it doesn't stick) through the JBWeld to shape a new hole. (Obviously, remove the screw so it doesn't bond, etc)
Several members have done this... but I don't recall anyone removing their carbs years later to see if it's still good.
It may be permanent... it may not.
I, too, think that for JBWeld to fail... it would have to be immersersed in gas for a while, which in this case, it wouldn't be.
On that matter, I don't recall anyone who's fix carb float posts with JBWeld (immersed in fuel) writing in that the repair had failed.

[powerram50]

the jb weld for my posts did not hold.i used a epoxy called qiuk steel and that has held for almost 500 miles now.

[skids]

broken post? pilot screw tip?

I believe you said you had a broken-off pilot screw tip and wallered out the hole. Your concerns are valid in that the location will be subject to gasoline. Someone tried it and it was a disaster, but maybe it was bad for other reasons than disolving the patch. Be carefull about the amount that you use because there is a side hole where gas enters that could get buggered. A little-dab-will-do-ya. PS, you have to get that tip out I think.

[trbig]

J.B. Weld

It was discussed at the meeting of the minds in Texas this year, that someone said they didn't have any problems with the regular J.B. Weld imersed in gas, but that the quick set J.B. Weld turned to a gelatin after a while.

I can't recommend either as I have never used it... but just something to add. TIFWIW.

Tod

[Espiritus]

Broken tip, redux

OK, I got the tip out and it was a tiny little thing to have caused all this trouble. The hole is wallowed out, though. There were actually TWO broken tips in the carb once I first started taking it apart, but the first one came out when I boiled them.

I bought JB Weld, the old fashioned kind, not the quick set. The area that I am going to use it in is very small, but since it curves, it should settle right where the hole should be.

Guess I'll follow the package directions AND the suggestions on the forum for using a discardable mixture screw.

Someone said that I needed to be sure and grease the screw so that it isn't inadvertently "welded" in; any idea what kind of grease to use? Length of time before it sets to remove it?

I have located a spare carb but it comes with its own set of problems. Now I understand why folks advocate buying a parts bike!

Will let you all know what happens when I get it done. I guess the worse that can happen is that I ruin the carb. . .hey, it was ruined if I hadn't gotten the tip out, right? Six of one, half dozen of another.

So, what kind of grease do I put on this screw?

[Espiritus]

Sorry!

I went to the edit to delete this when I realized it was opening as a new thread and not as a continuation of my original question. I was well within the ten minute time span but it wouldn't let me delete it. Sorry for clogging up the forum.

Grease?

Cam

[Ivan]

Probably any type of petroleum grease will work. Might be Vaseline is ok. If you are really anal about it, you could procure some mold parting wax.

Just something to act as a barrier to the epoxy getting on the needle while it cures.

[prometheus578]

JBWEld sets up rather quickly.... meaning, it will set and retain it's shape in a few minutes(though not fully cure)
Just some regular axle grease.... oil.. hell, could even use vasoline.
The idea is... as the JBWeld is setting up, run the pilot screw down into the hole... it will clear the JBWeld out of the way, reforming the passage. Then immediately remove the pilot screw. You could do this several times to ensure that the hole is forming nicely. Do not grease the hole... just the screw. (A light coating) Greasing/oiling it will prevent the goop from sticking to it.
Now then.. you need very little of the mixture. It's a small hole you are filling.
Do not shove the stuff down the pilot screws hole, but just take a little dab of it and place it around the hole from the inside of the carb throat. Smooth it out, one doesn't need a blob sitting there... just a thin coating of the stuff which the pilot screw can punch through.
Don't force too much goop up into the hole, as when you place the screw in there, it'll displace the stuff inside and may clog the inner circuit passages.

[prometheus578]

Administrative notes:

Espiritus: I merged the two threads for you.

Ivan: Don't use the words "anal" and "vasoline" in the same post. Especially in a thread about plugging holes.

[skids]

Damn Prom....good catch. You are good. Why are you so good at catching those buzz words? (kidding of course)

[Espiritus]

JB Weld and hole

Thanks for the info. I thought I would put the screw in FIRST, adequately greased, then put the JB Weld in with a crochet hook or a very small curette. Then displace the screw and smooth it out.

I bought a packaged set of hooks and picks at Home Depot with very small tips and cushioned handles that finally was able to get this tip out. These look like dental tools and weren't expensive. Easier to manipulate than the push pin, and easier to find than the gap gauge.

I'll set the screw and JB Weld in the morning after church when I feel the most "blessed".

Cam

[Ivan]

Re: Administrative notes:

Oh hell.

I hadn't realized I did that.

Now I must splash some gasoline on my shirt and get some carb dip in a cut on my hand just to reclaim my masculinity.

I promise not to dig the dirt from my nails for three days too.

Originally posted by prometheus578
Ivan: Don't use the words "anal" and "vasoline" in the same post. Especially in a thread about plugging holes.