Mending broken fins

[RichV]

Haven't tried it, but hear good things....

http://muggyweld.com/super-alloy-5

Brazing is one of the approaches I've been looking at. I'm looking at the site and this solution can be done with a propane torch.

I'll report back if I decide to experiment with this.

[RichV]

Does anyone know the operational temperature range of the XS1100 Engine?

[Prisoner6]

Hi, Rich -

Unless you're stuck/riding in a traffic jam on a really hot day, cylinder head temps should be in the 200-250*F range.

[RichV]

Hi, Rich -

Unless you're stuck/riding in a traffic jam on a really hot day, cylinder head temps should be in the 200-250*F range.

What's the maximum temp it can tolerate before bad things happen. I've always been told that 350-400 degrees is the upper limit. The brazing/soldering solutions all flow at 400 degrees. This allows the aluminum alloy stick/paste to flow well below the melting temp of the head.

[Prisoner6]

What's the maximum temp it can tolerate before bad things happen. I've always been told that 350-400 degrees is the upper limit. The brazing/soldering solutions all flow at 400 degrees. This allows the aluminum alloy stick/paste to flow well below the melting temp of the head.

In the traffic jam scenario I described, those cylinder head temps could likely approach 400*F ...

And in that instance, you would probably have to keep the revs up to keep the bike running and prevent seizure ...

So yes, I would agree that 350-400*F is the upper limit.

[RichV]

I'm going to experiment with the brazing. I can get some aluminum alloy rods from HF for $15 that have gotten good reviews. I can heat it up with a propane torch and flow it on. Afterwards, I'll grind off the access.

I'll try it on some broken aluminum parts I have around the shop.

I'll show pictures.

[latexeses]

This might be old news but I ran across this site on gas welding aluminum.
The demonstration is pretty impressive.

http://www.aluminumrepair.com/video-of-actual-repairs/

[Radioguylogs]

Float posts too?

Somebody should try that product on broken float post(s)

[crazy steve]

This might be old news but I ran across this site on gas welding aluminum.
The demonstration is pretty impressive.

http://www.aluminumrepair.com/video-of-actual-repairs/

This looks like good stuff.... I'm bookmarking this site....

[Gmac]

That looks like a great solution

For fixing cast AL issues.

Wish I'd had that a few decades ago on some of the AL heads I used to run on my Fiat's.

[DiverRay]

Ahh, 128's and X19's...... I worked as a parts man at a Fiat dealer for almost a year..... Abarth, that's all I need to say.

[latexeses]

I tried this on some pretty thin aluminum and it worked pretty well.

ONE THING. Try the practice with an aluminum can first and several times before you try using it on your project. It will test you. If you have to clamp the material use something that will not act like a heat sink.
I used a small hobby vice and it got pretty hot before I could get the rod material flowing.
Rodger

[Orange4]

I'm going to vote for the epoxy/JB fix. What you have there is a really good joint for JB weld. Lots of texture for the stuff to grab on to. If you mix it properly it should not get soft once it has fully cured. Someone repaired one of the the cam tunnel tabs on my head and that sucker is ON there.

There are many other good epoxies out there too. It will be your most invisible solution. Brazing and welding will be much trickier, time consuming and may not work well / look good in the end. You do not have to worry about the small amount of cooling you will lose. It's minimal. Also, if the JB weld does not work , you can always actually weld it on later.

K.I.S.S. Trying new techniques on an important part is a recipe for tears. From one OCD dude to another.

[LoHo]

That repair video was pretty impressive. I've tried other, similar products and not been as happy, although I suck at soldering, too, so it might be me.

If you're worried about the hot engine dissolving the JB weld...would temperatures that hot have already wasted the engine?