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The 16 had cartridge forks. The 17 not.
As far as I can tell, both have open cartridge forks.

I was looking at this on Ebay Andreani Fork Cartridge Kit for '17-'19 KTM 390 Through Bolt 105/KT7e 105/KT7 | eBay .. but I am taking a shot in the dark at best when it comes to forks and suspension internals.
FWIW, I've installed those and wrote some posts about it in this thread: Installing Andreani 105/KT7E fork inserts in a post-2017...
 

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As far as I can tell, both have open cartridge forks.



FWIW, I've installed those and wrote some posts about it in this thread: Installing Andreani 105/KT7E fork inserts in a post-2017...
Below is part of an email thread I had with Matt at Formula 390.

From: Matt Schreiner [mailto:[email protected]]
Sent: 23 September 2018 15:13
To:Kermit
Subject:
RE: R6 shock assembly and springs

Huh, well I'm just TOTALLY baffled! Yes the Racetech springs would be shorter, but I've not seen any forks on a 390 where the springs don't reside in the lower section. There is then a long rod between the upper and lower fork legs. It's a wacky fork design! I've NEVER had anyone report the Duke has different internals.

Unfortunately, KTM doesn't supply fork internals, so their online parts fiche only shows the legs. Whole. No details on what's inside. So... I started digging.

Son of a bitch! In 2017 they changed the forks to traditional inner workings! I'm sorry sir! I admit, I don't follow the Duke much, but this was a complete shock to me! :(

Is there anything I can do to make this right?
On September 22, 2018 10:36:08 AM CDT, Kermit wrote:
Hi Matt,
I attacked the forks today. With the top cap removed the OEM spring just slides out. No need to take the foot off. The K-Tech springs supplied (585173-10) are shorter than the OEM springs, 315mm vs 345mm for the OEM. Not a problem I thought so I made up a 50mm packer for the first attempt. PVC tube, easy to cut down if it’s too long. However the K-Tech spring has too small an ID. 24mm and the minimum ID to go over the cartridge is 26mm.

I’d specced up the packer as nominal 28mm ID, 37mm OD (same size as the OEM nylon packers) with a minimum ID of 26mm and a maximum OD of 39.5mm.

Some pics here. forksprings

I’m putting the OEM springs back in with a little extra pre-load (using the steel washers you supplied) and wait to see what you suggest
.
 

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Discussion Starter · #24 ·
Back shock is fitted and looking sexy! Taking her up the mountain tmrw for a spin. It is still going to be too soft for me but at least I have suspension that doesn't sit on the bump stop at my weight :)

53034
 

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Back shock is fitted and looking sexy! Taking her up the mountain tmrw for a spin. It is still going to be too soft for me but at least I have suspension that doesn't sit on the bump stop at my weight :)

View attachment 53034
Reviving a dead thread here, I know, but Andy was there any change to the seat height or total suspension length on the rear with the RacingBros shock? I haven't been able to find info on retailers or RacingBros sites detailing the length of the shock.

Thanks,
 

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Discussion Starter · #26 ·
I cant recall the number but we measured it and the height was the same after initial install. I have since wound it up 10mm in the rear and the little rocket corners and rides like an absolute dream now. I have yet to mess with the front as I havent found the need just yet. Once work slows down I most definitely need to replace the front rotor and pads or the entire front brake from bars to rotors as it's pretty much rubbish... the bank account is getting hammered by this bike but it's just too much fun not to spend the dollars on it :)
 

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Discussion Starter · #32 ·
I meant the R6 shock was a decent shock in its day but most you find on ebay are half dead at best or in need of a decent freshen up. Its still a much better option than riding on the rubbish standard shock though.
 

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On my 390 Duke, I run an Öhlins KT-301 shock and Andreani fork inserts, happy with them (y)
Now on my Duke 200, looking for other options such as Mupo GT1 or Nitron NTR-R1 shock and perhaps the Mupo Caliber22 fork inserts.
Anyone on here with experience on any of these?
Both bikes are first-Generation.
 

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I just installed the RacingBros rear shock on my 2021 without any fitment issues. It still needs to be set up, but it's movie night with the family so that will have to wait.

Because of the under-body exhaust I used ratchet straps hooked to the bike frame along with ceiling hooks to suspend/lift the bike rather than using a floor jack to raise it. No need to remove the hugger+chain guard unit. The swap literally just requires removing the two shock bolts, removing the old shock, putting in the new one and reinserting the two bolts. That's it. 15 minutes for what is, IMO, the best mod you can make to this bike.

Shout-out to 1Fngr for the fast shipping (and the warning that this kit wasn't guaranteed to fit the 2021)!

53498
 

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I just installed the RacingBros rear shock on my 2021 without any fitment issues. It still needs to be set up, but it's movie night with the family so that will have to wait.

Because of the under-body exhaust I used ratchet straps hooked to the bike frame along with ceiling hooks to suspend/lift the bike rather than using a floor jack to raise it. No need to remove the hugger+chain guard unit. The swap literally just requires removing the two shock bolts, removing the old shock, putting in the new one and reinserting the two bolts. That's it. 15 minutes for what is, IMO, the best mod you can make to this bike.

Shout-out to 1Fngr for the fast shipping (and the warning that this kit wasn't guaranteed to fit the 2021)!

View attachment 53498
Where did you find the part? RBI pointed me to Steady Garge in the states, and they are out of stock. Did you get it from a Canadian retailer?
 

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According to reports the R6 shock will NOT fit the 2020 390 Duke so that option is out. Anyone have any ideas on an option other than dumping far far too much money into a small bike just to get it to ride as it should?
What makes it not fit?? I just put a 07 R1 shock on my 2016 the day the head gasket blew on me. Had to grind some metal off above the swingarm bolt hole on the shock's adjuster side to make it fit (adjuster sticks out on the R1 shock making the bolt hole not line up otherwise), but it was bolt on other than that and a washer on either side between the swingarm mount.

edit: Disregard the coolant everywhere, head gasket had just blown before this pic (taken from video) and blasted coolant all over me from the overflow res.

53543
 
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