jb weld repair

duceolsen · Posted: Thu Jul 29, 2010 7:51 am Post subject: jb weld repair

Anybody used jb weld? I would like to hear if it worked or failed and where it was used.

I have an issue that I ran into with my rebuild and that is the only thing I could think of, the cam chain in my cb200 had completely worn away the area between the cylinders to the point that there was nowhere for the tensioner spring loaded push rod to go. I have completely filled the area with jb weld and drilled it back out. I will post some images tonight.

H2Lou · Posted: Thu Jul 29, 2010 8:02 am Post subject:

best stuff you can keep in your shop. Shocked

repaired cracks and holes in cases until replacement could be found.

KirkN · Posted: Thu Jul 29, 2010 8:08 am Post subject:

Ditto.

Great stuff for repairs like that. Works on exhaust pipe pin holes, too. The most extreme case I used it on was my boat motor's exhaust port. One port had eroded away right where it joins the exhaust manifold and was leaking. I used JBWeld to build up layers right in the exhaust port and built up the area and mating surface. I filed it flat and bolted the manifold back up. It was worked trouble-free for years, now. I can't think of a harsher duty that right there. Smile

About the only thing is doesn't do well is seal against oil or gas leaks. Oh well.

Good luck with it.

Kirk

Steve Searles · Posted: Thu Jul 29, 2010 8:56 am Post subject:

Go for it!

VisionDon · Posted: Thu Jul 29, 2010 10:14 am Post subject:

The two low spots on my Yamaha Vision gas tank were repaired with JB now over three years ago. Stuff does well but you need to be precise in your preparation, on a gas tank repair if you have any gas at all getting on the JB before it is cured will ruin it.

duceolsen · Posted: Thu Jul 29, 2010 6:31 pm Post subject: Images

Here is where I attempted the repair, I put a piece of metal there and used tape to attempt to make a mold.
Well see how it turns out, I am thinking it will take longer to dry due to the thickness.

G19Tony · Posted: Fri Jul 30, 2010 11:50 am Post subject:

I used JB to repair a crack in the right mirror holder on my CB200T. The mirrior still wouldn't work, so I JB welded the mirror into the hole. That'll do until I can find a whole other unit. It even matches the gray of the metal. Very Happy

duceolsen · Posted: Mon Feb 28, 2011 9:11 am Post subject: Failed miserably

Well the jb weld did not hold, allowed rod to slip and cam chain chewed up all the jb weld.
It all broke off in rather large chunks so was easy to clean up from the bottom of the crank case.
Lesson learned

Ordered used head off ebay, also will take this head to a local welder to see about getting it fixed.

tbpmusic · Posted: Mon Feb 28, 2011 10:23 am Post subject:

Yeah, it's pretty good stuff, but has its limitations.
I wouldn't rely on it to tap threads into or in any structurally critical areas, but it's pretty good for plugging leaks in non-critical areas........

CB200/175's have your problem a lot, as that adjuster is in an awkward place, and I usually manage to burn the snot out of myself on the exhaust pipes when doing it. So a lot of people ignore it, with the results you're encountering.

duceolsen · Posted: Sat May 07, 2011 8:09 pm Post subject: Weld Failed

So I had a fellow weld it up. Figured that since he welded for a living he would get it.
After about 400 miles i noticed a funny sound and then attempted to adjust the cam chain, the adjuster screwed in too far so I knew something was wrong.
The weld failed

05c50 · Posted: Sat May 07, 2011 8:21 pm Post subject:

I'm not a welder, but I've been around them for years. Welding aluminum is a little trickier then steel. I've seen some good looking aluminum welds fail before. Didn't you say that you got one from ebay??

...........Paul

duceolsen · Posted: Sat May 07, 2011 9:01 pm Post subject:

No this was the original that I had fixed, I did buy a used head off ebay but it will need a lot of cleaning up before I can use it.