[SedanGuy]

Thanks, they are infact not the 390 adv mirrors. They are off of the latest gen duke 390. Just got it checked. But hey they do the job perfectly.

[amyntor]

Originally Posted by SedanGuy

Thanks, they are infact not the 390 adv mirrors. They are off of the latest gen duke 390. Just got it checked. But hey they do the job perfectly.

Correct. The latest gen 390 Duke also comes with Dominar's mirrors. But its international variant gets a different set of mirrors.

The latest gen Adventure gets the international mirror set but with Dominar's stalk. One might wonder why did Bajaj/KTM make the mirror stuff so complicated.

Here's my gen 3 Duke with full set of international variant mirrors.

[advstreak]

Originally Posted by SedanGuy

Does this come in any KTM or Husquverna ?

Originally Posted by amyntor

.
The latest gen Adventure gets the international mirror set but with Dominar's stalk. One might wonder why did Bajaj/KTM make the mirror stuff so complicated. ]

So as already confirmed by others the mirrors installed on Sedanguy's ADV are from Dominar. But these mirrors did come as stock on some of the earlier batches of the 3rd gen dukes.

Here is a pic taken from the 2024 KTM Duke 390 Thread.

https://www.team-bhp.com/forum/motor...ml#post5628611 (2024 KTM Duke 390 Review)




Now in the later batch KTM started using dominar stem with the international shape as you can see here. The new adventure use the same mirror.

https://www.team-bhp.com/forum/motor...ml#post5937668 (2024 KTM Duke 390 Review)



https://www.team-bhp.com/forum/motor...ml#post5944050 (2024 KTM Duke 390 Review)



Now @amyntor How does the international stem hold against the dominar's stem in terms of vibrations? I have found the Domniar stems the least vibey but obviously at the cost of being heavy.

[amyntor]

Originally Posted by advstreak

Now @amyntor How does the international stem hold against the dominar's stem in terms of vibrations? I have found the Domniar stems the least vibey but obviously at the cost of being heavy.

I wouldn't say they are vibe free because the view gets a bit blurry at high speeds (125+ kmph). I have never tried Dominar's mirrors. So, I don't know how (un)vibey they are.

[virajvroom]

Glad so many bought up the mirrors. Have been eyeing on them from the day I bought the previous gen ktm 390 ADV. The best thing of these mirrors is that these have damper springs inside. However, the international versions surprisingly don't, even though the shape of the mirror is the same.


Credit: Bikes & More YT channel

The Dominar/Pulsar400Z mirrors are tapered inside in comparison to the new 390 Dukes/Adventures mirrors. The new ones provide better FOV (💪Of the Biceps, if not adjusted properly).

Pulsar 400z


2025 Duke 390


Just curious. How many here were waiting for the next gen, but have now decided to stick with their old gen due to its sports touring character? Planning to port the best bits from the new bike to the old. To be brutally honest, no matter what the 'pros' say, the new gen bike lacks the duke like sharpness. Also, a bit cramped for a 6 footer like me.

Mirrors are the first one I am going to port!

[advstreak]

Originally Posted by amyntor

I have never tried Dominar's mirrors.

Can you test ride one of the new duke with the dominar's stem and do one is one comparison of the vibration?

Originally Posted by virajvroom

The best thing of these mirrors is that these have damper springs inside.

The springs are not for damping. They are doing the job of spacers to clamp the ball joint, making sure the mirrors do not loose their position due to vibrations and wind pressure.

Originally Posted by virajvroom

However, the international versions surprisingly don't, even though the shape of the mirror is the same.

That's because the stem design is entirely different and hence, the mirror mounting is different.

Here is the new gen duke.



and here is the international spec one.

Originally Posted by virajvroom

Mirrors are the first one I am going to port!

Just be aware that these are going to be heavy and costly. 1 kg in weight and ₹ 4000+ for both mirrors. They dampen the handlebar vibration a little, along with making the steering heavy.

[virajvroom]

Originally Posted by advstreak;

The springs are not for damping. They are doing the job of spacers to clamp the ball joint, making sure the mirrors do not loose their position due to vibrations and wind pressure.

Thanks! Done my research and going for it. The spring is for damping, for sure. Have checked with my folks at Mattighofen. If it was just about spacing, then a normal cyclinder spacer/bush would have done the job like it does on the international version.

The international versions have a different mirror mount because they seem to be less bothered about vibrations. And it makes sense. The international versions of the ADV (previous and present gen) didn't come with bar-end dampers as well. Plus the current gen 390 ADVs both X and R have round mirrors there.

Not really bothered about the weight. Seen people stripping the Himi to reduce weight and somersaulting to break their bones now.

[advstreak]

Originally Posted by virajvroom

The spring is for damping, for sure. Have checked with my folks at Mattighofen.

Can you share a write-up of how just a spring is used for damping?

From first principles of passive isolation, it requires a damping element in addition to a spring element to be effective. I could not find one in one of my exposed mirrors unless it was hidden inside.


Source:https://en.wikipedia.org/wiki/Vibration_isolation

Originally Posted by virajvroom

If it was just about spacing, then a normal cyclinder spacer/bush would have done the job like it does on the international version.

A simple metal spacer in the dominar stem will give a very non-linear clamping load profile. It will be loose at one instant and in a quarter turn compress the part by 0.2 mm ( assuming M5 thread of 0.8 mm pitch), making it impossible to adjust. So either a complaint spacer or multiple tightening points like the older generation mirrors is required.

[virajvroom]

Originally Posted by advstreak

From first principles of passive isolation, it requires a damping element in addition to a spring element to be effective. I could not find one in one of my exposed mirrors unless it was hidden inside

Good. Secondary research in theory. It comes straight from the manufacturers. Get in touch with KTM/Bajaj and explain this. Care to Install, test and share the results.

I will do that once I install and share the before and after real-world results in my video like I always do. I don't believe in theories only physical evidence. And if it doesn't work. It doesn't work! I am not an influencer. The core issue was a reduction of vibrations. Not a review of the Wikipedia paper on passive isolation.

[virajvroom]

Originally Posted by SedanGuy

Hey Fellow 390 adv riders, I dont know if this is already shared here or not. But here goes.

Attachment 2742207

Fabulous! These simply elevate the POV you get from the helmet. The mirrors of the latest ones are not in stock yet here. But the dealer said they would procure a pair at the earliest. Waiting now...

[advstreak]

Originally Posted by virajvroom

It comes straight from the manufacturers. Get in touch with KTM/Bajaj and explain this. Not me.

Originally Posted by virajvroom

Have checked with my folks at Mattighofen

I do not have contacts at Bajaj/KTM. I was hoping to learn something from you , as you mentioned you have contacts there.

Originally Posted by virajvroom

Care to Install, test and share the results.

I have been using the Dominar mirror since the last 16 months and over 38k+ Km.

https://www.team-bhp.com/forum/motor...ml#post5652998 (Ownership Review | KTM Adventure 250)

Originally Posted by virajvroom

The core issue was reduction of vibrations. Not a review of the wikipedia paper on passive isolation.

Originally Posted by virajvroom

Done my research and going for it. The spring is for damping, for sure.

The point I wanted to discuss is that the vibration reduction in the dominar mirrors comes from the stem and not the springs, as per my basic understanding of vibration damping. This makes it very intriguing for me to figure out if only the springs can be used for damping both personally and professionally.

Originally Posted by virajvroom

The spring is for damping, for sure. Have checked with my folks at Mattighofen.

Now, as you seemed to have confirmed that the springs acts as dampers there needs to be some dissipative element ( i.e rubber) in between to dampen the vibrations again as per my basic understanding of the vibration damping.

So I opened the left mirror, which I have lost the cover of in a trail fall.



There does not seem to be any rubber part in the assembly anywhere.







It has a conical spring, m5 locknut and a hemispherical ball spacer.

Originally Posted by virajvroom

If it was just about spacing, then a normal cyclinder spacer/bush would have done the job like it does on the international version.

Now I did replace the conical spring with spacer/bush.



As suspected, it made very hard to control the tighness of the mirror. At one instance, it was loose enough to loose its position due to vibration and quarter turn later tight enough making it almost impossible to adjust the view.

I also did a 50km highway ride to see if there was enough difference in the vibration damping. I could not find any difference in terms of level of vibrations.

Here is video of the mirror vibrations with the stock conical spring.

https://youtu.be/-Zgv1X62UpI

And here is with the bush.

https://youtu.be/LPuUT3cMois

So @virajvroom please do clarify if I am missing sometime that makes the conical spring to be used for vibration damping?

[SedanGuy]

Folks - I tested these new dominar / duke mirrors in my breakfast ride over the weekend and they are damn near perfect. There was no or negligible vibrations at 90+ kmph speeds. The original mirrors vibrate a heck of a lot in comparison. 95% of the blinds spots are eliminated.

Super happy with these mirrors, highly recommend them. And they do match the vibe of the bike more than the originals. Highly recommend them if anyone is on the fence.

[Vignesh_N/A]

Originally Posted by advstreak

...It has a conical spring, m5 locknut and a hemispherical ball spacer...

+1

The use of tapered spring is not to dampen the vibrations here. It acts like spring washer preventing the nut from loosening up.

[advstreak]

Originally Posted by SedanGuy

There was no or negligible vibrations at 90+ kmph speeds.

Did you notice any reduction in handlebar vibration or the heaviness of the steering post installation of the dominar mirrors?

Originally Posted by Vignesh_N/A

It acts like spring washer preventing the nut from loosening up.

The nylon locknut provides much better torque retention compared to spring washers.

https://youtu.be/IKwWu2w1gGk?t=160

I would still believe that the conical spring was used to give fine control on the clamping load so that the mirrors are just tight enough so that they do not lose position due to vibrations while still being easy enough to adjust the position.

[Ketan]

Folks, quick question. Is this thread specific to the KTM 390 Adv 2024 and earlier edition? Since I did not see any recent post for 2025 KTM 390 Adv and hence asked. Thank you.