JB Weld Experiences

I gouged out about three square inches of my block just under the ignition cover (right side) when I crashed recently.

I used JB Weld, which is a heat tolerant metal infused epoxy putty for those who didn't know (myself included).

I built up a dam with duct tape of all things, to which I applied the putty. I put it in thickly so that I could file it back to the original shape.

Took fifteen hours to cure, but it filed wonderfully! In fact, once it is painted, it will be hard to see that there was ever damage in the first place.

Has anyone ever used a similar method to repair block damage?

How will it deal with the heat and vibration? The package said 500 degrees.

I repair broken fins and what not on my Zs using JB Weld too. How long might JB Weld repairs hold up?

When I crashed my '73 Z1-900 in 1977, I repaired the three broken fins on the right side of the cylinder head. All three are still on just fine.

I too have repaired fins with JB Putty. Works great.

I repaired a broken ear on my intake side of the head with the stuff it works great.
For smaller projects I bake the piece in the oven at 250 degrees, makes the bond even better and gives it a nice smooth glazed finish.

Is there any pics of that JB weld I have never heard about
that. I have also one broken fin on head of my z900 which
I want to repair!
Has someone got pics of fin repaired with Jb weld?

Wish they had a second formula that wasn't so brittle. The uses would be many.... CRACK!

I just repaired a broken line on my jeep with it and now I am saying my prayers

Qdude,
I have repaired my 750 with JB Weld. It had the same damage you speak of, the ignition case was broke. I riveted a piece of sheetmetal perforated screen and layed up a few coats of JB on it. It is rock hard. I have yet to give it a try as the bike is in the project stage.

If you want to hear and read something almost unbelievable check out this guys website. Sign up for it and you get access to his hi-velocity intake porting pages. What does he use in his intake ports? JB Weld.
www.mototuneusa.com

When you're laying up the JB Weld it can be wet shaped just like modeling clay. The trick is to let it just start to set up and just rub/rinse the surface to the shape you want. It'll save you hours of sanding filing time and will have no effect on the eventual strength of the repair.

KZCSI

my 12r cases were fixed with jb weld right under the stator cover. the PO crashed/ fixed the bike. works greatB)

OldSchoolHr wrote:

Is there any pics of that JB weld I have never heard about
that. I have also one broken fin on head of my z900 which
I want to repair!
Has someone got pics of fin repaired with Jb weld?

Toni,

Here is the J-B Weld website: jbweld.net/products/index.php

What I used to repair the broken fins was similar to the "J-B Stik" product, but I didn't actually use J-B brand. What I used was a high-temperature epoxy putty shown here:

Here is the "before" picture of my cylinder block: