Ducati Monster Forum

Moto Board => Tech => Topic started by: cmejia1978 on December 13, 2012, 05:49:57 PM

Title: how to repair HOLE in Akrapovic CF exhaust
Post by: cmejia1978 on December 13, 2012, 05:49:57 PM
hi!

Well a friend of mine is selling me the whole high mount system for my 620ie 2002, Akra, BUT one of them has a wear hole, inside part, just about in the middle of the can, inside face... guess the tire did it some-how, my question is: is there a way to repair it? the hole is about 1.5 inch wide, you can see that is not that bad and I was wondering, since is the inner face of the exhaust if I could just put some CF little plate on top, rivet it and that's it.. ideas?¿  [popcorn]

(http://farm9.staticflickr.com/8060/8270401079_9e08569581_m.jpg)
Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: J5 on December 13, 2012, 09:36:05 PM
if you were to repair it then i would do it from the inside

but the integrity of the CF is going to be in doubt anyway

I wouldnt be surprised if you couldnt get a new CF sleeve , the Q is how much ?
Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: ducpainter on December 14, 2012, 04:09:32 AM
Looks like a burn hole due to the cans not being repacked to me.

Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: zooom on December 14, 2012, 04:26:23 AM
contact Akro and see what parts may be available and at what price...
Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: Raux on December 14, 2012, 10:28:12 AM
https://store.58cycle.com/category_s/163.htm
Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: cmejia1978 on December 14, 2012, 03:55:13 PM
Thank you all! Raux link is great, still isn't there a DIY way? Pleaasseeee ideas!  [bow_down]
Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: Shatrat on December 14, 2012, 04:03:29 PM
Get it very clean and epoxy woven cf over it.
Make sure the 2 part epoxy soaks the cloth but brush off as much excess as possible. Would be less noticeable if you could do it from inside.

Its not a structural item so you don't need to get too fancy with ovens and vacuums and so on.

Edit

Something like this, if 6"is good enough.
http://www.fibreglast.com/product/Carbon_Fiber_Sample_Pack_04005_A/sample-packs-carbon-fiber (http://www.fibreglast.com/product/Carbon_Fiber_Sample_Pack_04005_A/sample-packs-carbon-fiber)
Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: cmejia1978 on December 14, 2012, 05:59:11 PM
holly sh$t that is exactly what I was looking for! thank you!  [thumbsup] now I can tell my buddy to sell me the cans!  [clap]
Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: FrankenDuc on December 15, 2012, 03:50:59 AM
Quote from: Shatrat on December 14, 2012, 04:03:29 PM
Its not a structural item so you don't need to get too fancy with ovens and vacuums and so on.
http://www.fibreglast.com/product/Carbon_Fiber_Sample_Pack_04005_A/sample-packs-carbon-fiber (http://www.fibreglast.com/product/Carbon_Fiber_Sample_Pack_04005_A/sample-packs-carbon-fiber)
[thumbsup]

1) Go to your local marine or aviation supply shop, or online these are the ones I go to:
- West Marine
- Wick Aircraft and Organ Supply
- Aircraft Spruce
- McMaster Carr
and get some CF cloth and high Tg 2-part epoxy.

2) sand down the rash area, and surrounding areas you want to blend (perhaps the whole can, the weave is going to be terribly difficult to get lined up, if you don't care cool, if you do just plan to wrap the whole can and leave a seam on the inside, towards where the tire is).

3) paint a coat of properly mixed epoxy on the repair area. 

4) put a piece of CF cloth, cut to size, on the repair area.

5) paint epoxy on the the cloth, check it soaks in real good.

6) squeegee the excess epoxy off and all air bubbles out (note, this is the point where if it was structural, you'd want to vacuum bag it..., but it's not, so don't worry).

7) if you happened to chose a sun/UV-cure epoxy, hope it's not too cloudy, stick it out in the sun for a minute...  Otherwise stick it out in the clouds for three...

8) sand, and repeat (3)-(7) until you're happy with the blending and the thickness of the CF layers you have

9) sand and polish to desired sheen.

OR... stick'em on the bike, as is, hole and everything, and when people comment say "Yeah... You wanna see the scars?  ;D"

[beer]

Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: DarkMonster620 on December 27, 2012, 05:45:12 PM
Quote from: FrankenDuc on December 15, 2012, 03:50:59 AM
[thumbsup]

1) Go to your local marine or aviation supply shop, or online these are the ones I go to:
- West Marine
- Wick Aircraft and Organ Supply
- Aircraft Spruce
- McMaster Carr
and get some CF cloth and high Tg 2-part epoxy.

2) sand down the rash area, and surrounding areas you want to blend (perhaps the whole can, the weave is going to be terribly difficult to get lined up, if you don't care cool, if you do just plan to wrap the whole can and leave a seam on the inside, towards where the tire is).

3) paint a coat of properly mixed epoxy on the repair area. 

4) put a piece of CF cloth, cut to size, on the repair area.

5) paint epoxy on the the cloth, check it soaks in real good.

6) squeegee the excess epoxy off and all air bubbles out (note, this is the point where if it was structural, you'd want to vacuum bag it..., but it's not, so don't worry).

7) if you happened to chose a sun/UV-cure epoxy, hope it's not too cloudy, stick it out in the sun for a minute...  Otherwise stick it out in the clouds for three...

8) sand, and repeat (3)-(7) until you're happy with the blending and the thickness of the CF layers you have

9) sand and polish to desired sheen.

OR... stick'em on the bike, as is, hole and everything, and when people comment say "Yeah... You wanna see the scars?  ;D"

[beer]



He'll be lucky to get that in Guatemala
Title: Re: how to repair HOLE in Akrapovic CF exhaust
Post by: cmejia1978 on December 27, 2012, 05:55:24 PM
exactly that is why me and my idea went to hell for an answer and we couldn't find it!  [bang]