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Broken cylinder fin

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Old Dec 29, 2015 | 07:05 PM
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Default Broken cylinder fin
I have a broken cylinder fin and I am trying to fix it. Here is what I have.
 
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Old Dec 29, 2015 | 07:28 PM
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So I went to harbor freight and picked up a heat gun, sheet metal pliers and a friend gave me some alumiweld. So I used the heat gun on high to warm up the metal and used the pliers to get it straight.
Then I flipped it over ground the break with the dremil tool. I used the heat gun and map gas to braze the seem. My problem is that I could not get the fin hot enough to melt the rod. So I guess I will use jb weld. It is on the under side of the cylinder.
Does anyone have another fix?
 
Attached Thumbnails Broken cylinder fin-img_20151229_140331.jpg   Broken cylinder fin-img_20151229_135444.jpg   Broken cylinder fin-img_20151229_161429.jpg  
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Old Dec 29, 2015 | 07:35 PM
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Looks good from here to me already. Get some flat black spray. Spray in a baggie and use an artist brush to touch up. (there is an article on here or maybe youtube aluminum welding.
 
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Old Dec 29, 2015 | 08:07 PM
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Since you already have it off the bike why not just pick up another cylinder for cheap and get it cross-hatched and put it back on the bike instead of the one you've got?
 
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Old Dec 29, 2015 | 08:40 PM
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Originally Posted by RIPSAW
Looks good from here to me already. Get some flat black spray. Spray in a baggie and use an artist brush to touch up. (there is an article on here or maybe youtube aluminum welding.
I practiced on some scrap aluminum before I tried working on the cylinder and was pretty successful with the alumiweld. I was going to use some high temp ceramic spray paint to cover it up. I was worried about vibration messing up that fin somehow.
 
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Old Dec 29, 2015 | 08:46 PM
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Originally Posted by OldEnuf2NoBtr
Since you already have it off the bike why not just pick up another cylinder for cheap and get it cross-hatched and put it back on the bike instead of the one you've got?
I am cheap and I would have to bore it for a 95".
Thank you both for your replies.
 
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Old Dec 30, 2015 | 06:26 AM
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your not going to weld anything with a heat gun,use a torch
 
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Old Dec 30, 2015 | 08:09 AM
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That part takes many heat cycles..super hot and then cooling...stressed part.
If part must be re-used then a cosmetic approach might make for a longer lasting option.
 
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Old Dec 30, 2015 | 10:28 AM
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Originally Posted by prodrag1320
your not going to weld anything with a heat gun,use a torch
I did use a torch. The heat gun was used to warm up the cylinder and prevent as much heat from being pulled away from where I was working with the torch.
 
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Old Dec 30, 2015 | 06:07 PM
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Ok.i missed that in your original post
 
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