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Jon’s posts are always intelligent and he has great knowledge . Maybe Trummer should read Jons helpful info he has posted.

We don’t need forum police.

Leave that to the admins.
 

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I had to wait until the first 600 mile/1000 km service was completed until I fitted the Coober ECU.
First impressions are that the instructions could be more complete.
Coober recommends that you place the wiring over the seat frame and into the frame around the engine.
This idea seemed untidy to me, and I sought a better method.
I figured that the wiring would tuck in under the fuel tank, and I had to:
  • Remove the left fuel tank panel
  • Remove the rearmost fuel tank fastener and the 2 rubber buffers
  • Remove the left-side front seat mount capstan
  • Remove the left-side rear seat panel
Doing this enabled me to squeeze the wiring under the tank and atop the existing wiring:

https://flic.kr/p/27yzzG3https://www.flickr.com/photos/[email protected]/

The Coober ECU is rather large, and just fits into the void under the pillion seat:

https://flic.kr/p/27yzD93https://www.flickr.com/photos/[email protected]/

(I've currently removed the tool kit from under the pillion seat, as I doubt there's room for both ECU and tools.)
The test ride was a revelation, and the stuttering and surging had gone.
As many have said, this is how the 390 Duke should have been from the factory.
Whether the Coober ECU is better than the lower cost Boosterplug is option to conjecture, as I've yet to compare the two.
The Coober isn't cheap, but it does work very well.
 

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I had to wait until the first 600 mile/1000 km service was completed until I fitted the Coober ECU.
First impressions are that the instructions could be more complete.
Coober recommends that you place the wiring over the seat frame and into the frame around the engine.
This idea seemed untidy to me, and I sought a better method.
I figured that the wiring would tuck in under the fuel tank, and I had to:
  • Remove the left fuel tank panel
  • Remove the rearmost fuel tank fastener and the 2 rubber buffers
  • Remove the left-side front seat mount capstan
  • Remove the left-side rear seat panel
Doing this enabled me to squeeze the wiring under the tank and atop the existing wiring:

https://flic.kr/p/27yzzG3https://www.flickr.com/photos/[email protected]/

The Coober ECU is rather large, and just fits into the void under the pillion seat:

https://flic.kr/p/27yzD93https://www.flickr.com/photos/[email protected]/

(I've currently removed the tool kit from under the pillion seat, as I doubt there's room for both ECU and tools.)
The test ride was a revelation, and the stuttering and surging had gone.
As many have said, this is how the 390 Duke should have been from the factory.
Whether the Coober ECU is better than the lower cost Boosterplug is option to conjecture, as I've yet to compare the two.
The Coober isn't cheap, but it does work very well.
Thank you for your pictures and writing taking my bike for its first service in a week will be asking the dealer if they have any info .:)
 

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Might order one myself (2018 Duke 390)

Also interested in feedback from someone who fitted one to the 2017 onwards bike.

I currently have a Rapid Bike Easy but it looks like it’s triggered the check engine light 200 miles after fitting it.

Still waiting for a reply from their customer help centre.
 

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Installed and am enjoying the performance boost at higher RPM's since break in....Its fully warrantied with KTM and I felt necessary since I did a CAT delete and slip on with Werkes USA and DNA Filter...
 

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Fueling has been ok, yes...its really a seamless piggy back ECU that takes in consideration of what I wanted to remove and add to the bike.
 

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Installed and am enjoying the performance boost at higher RPM's since break in....Its fully warrantied with KTM and I felt necessary since I did a CAT delete and slip on with Werkes USA and DNA Filter...
How does the performance feel after the unit? Does midrange increase?
 

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Mid range increases from my experience , again its paired with a few other goodies to help breathing.... However it is expensive for the gains you receive!
 
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