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Discussion Starter #1
Hi all,

Ordered an Akrapovic exhaust for the 790, but have been reading the newer e4 compliant exhausts don’t give you the option to remove the baffle anymore?

Can anyone confirm if this is true for the 790?

Peace,
Owl
 

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Hello Owl,

yes, you are right, due to the E4 norm it is not possible to remove the DB-killer.
The shop where I orderd my 790 came with an sollution. The DB-killer is mouned with small hexagon bolt. They will drill a small hole through the carbon end cap to access it. Remove the bolt and you can get the the DB-killer out. Place a little cap in the hole and it looks likes OEM.

Kind regards,

Herman
 

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Discussion Starter #4
Thanks HDG, getting my akra and tail tidy fitted by the dealer this weekend, will ask them if they'll give it a go, if not it will be some DIY :)
 

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Hi
after seeing youtube video I removed the baffle in less than 30 minutes including removal and refitting exhaust
I spray wd40 to loosen the baffle and removed without any hammer just small pliers and gently wiggling the baffle up and down.

the allen headed bolt inside is welded on so it does take a firm twist and a good quality allen key to remove.

you have to drill a 10mm hole otherwise you cannot get the allen bolt out
 

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Discussion Starter #7
Not sure if this is allowed, can't find a for sale section or anything in the rules, but would anyone UK based be interested in buying second hand Akra exhaust?
Not drilled yet btw.
 

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Discussion Starter #9
I'm still undecided to be honest, I've purchased some new HSS bits and the step bit to drill out the baffle as it's definitely not loud enough. Now thinking maybe should just sell the Akra as is and buy something already baffle free. It's also quite large, and I do really like the look of the AR end pipe. I guess it depends if I can find a buyer, may end up just keeping it for the moment.

You posted above, audio file before and after but there is no file or link? Do you still have the audio?
 

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Owl
the recording did not really work
It is easy to remove and replace the baffle on this akra and i used a rubber bung to fill the hole

I drilled a small 5mm hole to ensure correct alignment, then used a dremel with abrasive bit to enlarge the hole in the carbon very carefully to just the correct size to get the head of the baffle bolt out of the Akra
got some pictures if interested
 

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Discussion Starter #11
Owl
the recording did not really work
It is easy to remove and replace the baffle on this akra and i used a rubber bung to fill the hole

I drilled a small 5mm hole to ensure correct alignment, then used a dremel with abrasive bit to enlarge the hole in the carbon very carefully to just the correct size to get the head of the baffle bolt out of the Akra
got some pictures if interested

Yes please.

Would you say the measurements in that video were accurate as to where the hole needs to be? Also what tape did you use, if any?

I'll drop you a pm
 

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The measurements given were about 4 mm out for me, so my hole was slightly wrong when i followed the previous mentioned instructions as i then found i had to enlarge the hole with a dremel bit to gain full access to the bolt, this left me with an oval hole. Which i ended up enlarging to bring it back to round , so in the end i have a slightly bigger hole than i needed and purchased a bigger bung to fill it up as required.
so this is why i would recommend drilling smaller hole, carefully checking the alignment of this hole to the bolt center then use dremel with abrasion bit to enlarge hole to exact size and correct position.
This way you will end up with the smallest hole correctly positioned over the bolt
Remember the hole has to be big enough to get the bolt head through.
You will not be able to use a socket set to unbolt this
you need a good quality torx and i used a box spanner on the end of the torx to get sufficient leverage
 

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Discussion Starter #15
All done, went a lot smoother than expected

Removed rear pegs and exhaust



Hole drilled, looks spot on



Sprayed some gt85 and managed to wiggle out the baffle. The nut has a spot weld, so needs a bit of muscle



Down the pipe



This is a bit of an odd one, the clamp nut was positioned facing the other way and quite hard to get to, I’m now wondering if they did that intentionally to make it difficult to nick?

 

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thanks for the good pics. Il be doing that soon.


But i read today they giving people more and more tickets for driving without a db killer.. germany, netherlands.. 380euro fine for someone in the Netherlands! So retarded
 

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Discussion Starter #20
And is it possible to replace the baffle?
Yep, the hole drilled was directly over the nut fortunately. I used the measurements in the video but moved the horizontal measurement a few mm to the right. The hole size I ended up with was 13mm diameter, just enough to get the socket head through.

Baffle can now be put back in, rubber grommet removed and nut screwed back in if desired.
 
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