KTM 390 Resonator removal.
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- čas přidán 5. 01. 2022
- In this video I discuss which part of the exhaust on the KTM 390 Adventure and the KTM 390 Duke is the resonator. I discuss what the resonator does in the exhaust system and why I decided to remove mine in favor of a straight through mid-pipe. The resonator is a huge chamber attached to the exhaust commonly mistaken for the catalytic converter. It is not, but it is huge, heavy and generates a lot of heat next to the rear shock. See why I removed and how to replace it.
- Sport
Thanks, Matt! Love your channel. Every time I'm looking to do something to my 390 you already have a video up for it!
Thanks for another well done video, I’ve often looked at that big chunk of metal exhaust piece there and just makes sense to get rid of it. I was very interested to see that you made a video on the removal and why. I appreciate your thoughts of leaving it or removing it and reasons, also the information and conversation that you had with the manufacturer replacement piece regarding the shock heating up. Video well done and I’ll be waiting for your next one.
Congrats on your 2021 achievement and bonus on the 31 days in a tent. Major props!
Thanks! It just kind of happened.
I did this on my bike too, the loudness improvement it's huge on a aftermarket exhaust! I was mounting Arrow pro race with a modded db killer, I had to put back the original dB killer because it was way too loud! Now it's perfect! I did it for the heat on rear shock too. But damn I feel the bike so better now. It's definitely a must mod in my opinion! 😎😎
I did this mod and have the best dual sport end cap and it sounds and works amazing.
This was the highlight of my holidays lol. Been eagerly waiting for this video. Thanks for the information, so far my shock has been good but this is food for thought. Congrats at the 20k miles!
Thanks, glad I could make the holidays JOYFUL!
@@advmatt COVID being what it is, stuff like this keeps you going. Had to forgo family and friends over this year unfortunately. Can't wait until the weather clears up to get back on the bike.
@@RG-eb8pb sorry to hear you had to keep your distance. Plan your next summer's worth of riding, routing, places to stay, tires, maybe a few new pieces of gear. That helps me through non-riding times.
EPM is great. I got a front Andreani cartidge and rear Hyperpro shock from them last fall. I went to my local shop for install and the suspension guy set the sag. It's been a game changer. I got in three rides before winter hit. On road there was a marked improvement all around. Turning and braking are both improved dramatically as expected, but the real surprise is how the bike accelerates. It isn't faster of course, but there isn't that subtle dive/lift I used to experience during hard acceleration when changing up a gear. Off road it is literally night and day. Trails that I struggled with became enjoyable and sections that I normally couldn't get through were passable. This is the first motorcycle that I bit the bullet and paid for a suspension upgrade and it is worth every penny. I agree with you about the weight and heat loss and flow/sound gain. Let's be honest though... it looks better too.
Great stuff as usual. Keep rolling 😎👍
I like the stealthy quiet of my stock exhaust, but this is useful information for the future, because it seems made of some easyrust tin, and if it degrades I'll replace with a straight through pip like you've done there.
Lots of great information. I ordered a mid pipe a month ago, but I still have not remembered order gaskets... - Frank
Great video! Helped me a bunch THANK YOU!
hey Matt , i have done this with my bike , and found it sounds heaps better runs fine , bought a cheap unit , looks great , happy with it . cheers Steve / Australia
Such an easy upgrade that makes such a huge difference. Thanks for letting us know!
Hi Steve, where do you bought the cheap one?
where did you get the cheap one please?
Well done. Nice video about how to correct a problem with simple factory components.
Hey Matt. Did this swap and Wow. I have the Best Dual Sport end cap and does it ever sound deep and amazing. Not too loud just really throaty. Super happy with the performance and sound. Thanks for the vid!
Glad to hear it. I have been considering the end cap. Its good to hear your feedback. Thanks.
so it is not too loud with the end cap and delete pipe? I was thinking of going that way but afraid of ot being too loud. thanks
@@PhilJensen i did eventually order the quiet insert for it on long rides. Made it perfect.
@Shawn Hartley what is the quiet end cap? and just to make sure I get it you are saying the bds end cap and the resonator delete pipe was loud enough to annoy you on long rides? thanks for info!
I don't want to spend an arm and leg to upgrade the whole system. I think your approach is just what I am looking for. Thanks.
That sounds great Matt..
Thanks a lot for very useful content !!!
Time for the new Tusk high fender kit. Putting mine on this weekend.
I would agree the extra heat can not be good for the shock. Not only the heat generated by the resonator, but it seems to be a big block for incoming air to the shock.
Many thanks for helpful content
Matt, nice video ❤️
Thats a good mod, even just getting the heat out is worth it. I think it has an effect on the shock. the 790s have the same issue.
Im pretty sure its a cat on the 790 though and it needs a tune for more fuel if removed on the 790. KTM labels it as a pre-muffler on the 790. Lol
The 790 is pre Euro 5 though.
Sounds good and doesn't seem too loud. Nice video Matt!
I am certain you are thinking correctly about the heat & the seals on your shock. It should make your shock very happy & cooler!!!!!
Easily the most descriptive and technical post on the subject, thank you, I will be proceeding with the same conversion. Love the fact you clarified no mapping is required, it had prevented me from doing this mod. I just need a little more noise for presence awareness in Sydney city traffic(Australia). Mines a little Duke, lovely thing.
You are welcome. Enjoy the new feel and sound.
How was your experience Trevor? What year is your duke 390?
@@KrazyKanucker It’s winter in Australia & I haven’t ordered one yet.. will soon.. get back to you. Cheers
I did the resonator change, and I'm very happy with the sound and performance. I had a question about your experience with vibration - I noticed the image in my stock mirrors have the quivers pretty noticeably. I'm not sure if I just didn't really notice it before, or if this is something new with the resonator delete. Another possibility is an incident a couple of weeks ago where I went down pretty hard and bent the crash bar. Or it could be that it was always quivery and I'm just picking up on it now. I don't really feel a vibration difference - its always been buzzy on my hands, and still is. Did you notice any change like this when you took your resonator out? Do you recall if your double take mirrors improved image stability over the stock mirrors? Thanks.
My double take mirrors vibrate more than than the stock mirrors. I only had the stock mirrors for a few hundred miles so I dont have a great comparison. My experience is the resonator delete made the engine smoother in the upper RPM range but more viby below 5k rpm. Not a huge difference, but noticeable. The resonator smoothed things out. It is really hard to tell without riding the same bike back to back with and without the resonator.
Last summer I replaced the endcap on my stock exhaust with one from Best Dualsport Bikes pretty much just to improve the sound. They say it gives you a couple more horses, but I can't tell from the butt dyno. I love the new sound though. Your mod which removes over five pounds of weight seems very worthwhile. Wonder how the sound would change with my more open endcap? I would love to hear a report after a few hundred miles to see if you've run into any downsides to the mod (ie. performance changes). Thanks for the video.
I will let you know how it goes. I think a new end cap or replacement exhaust might make this bike really loud. Might wait for those extra mods.
Great vid thanks
Hi Matt, how is this holding up now? Any signs of damaging the engine etc? I have an aftermarket exhaust with baffle still installed, I've also removed the plastic cover under the seat to give better air intake, just wondered if I did this too (mainly for weight saving) would I be running leaner than the ecu could compensate
So far no issues running without the resonator. A majority of the back pressure comes from the header pipe. Removing the resonator and using an aftermarket exhaust might make the bike really loud. I only have 600 miles on this setup so far but it seems fine. From what I have seen replacing the header pipe is what really necessitates a new fuel map, but then you have to keep the resonator for back pressure.
i did change the muffler as well . cheers Steve/Geraldton Australia
how's did it run/sound after removing the resonator and changing the muffler?
Great video! Quick question what foot pegs are you running? I'd like to get new ones that are level thanks!
The footpegs are Black Dog Cycle Works. Here is a link to the video I did on them. czcams.com/video/EW_AZgyBHAw/video.html
Hey Matt. I recently took the resonator out and added a mid pipe and an eBay slip on muffler. Definately louder!! So much so I'm going to put the OEM muffler back on to compare, but after listening to yours it sounds acceptable. Dont get me wrong love to hear a thumper, but if i'm travelling for a few hours I dont think I'd want that Dakar racing bike sound in my ears all day. Hahaha
Totally understandable. I don't really notice the exhaust note over the wind buffetting. My helmet is maddeningly loud at highway speeds. Offroad it makes me giggle every hard twist of the throttle. Removing the resonator is the real need IMO.
@@advmatt Wind noise isnt too bad with mine as I added a Givi Airflow, but with the help of spacers I angled the screen forward like a rally bike. Huge improvement!
If I end up keeping this bike for long term I'll upgrade the exahust system to perhaps a Dominator system or Delkavic if they can supply one.
Great video. Would this mod void the warranty on a newer bike, do you think?
Great question. It might void certain aspects of the warranty. Anything on the bike affected by this mod, like the engine might not be covered.
Good job❤❤❤
Thsnks.
What would be your advice for someone who wants to delete the resonator but keep things as quiet as possible? I ride in another country where stealth mode is more advisable but also heat is an issue. Venting heat faster to protect the shock should affect overall operating temperature, no? Any noticeable change in overall heat from the mod?
There is really no way to remove the resonator and keep the bike quiet. The heat under the seat is much better. The shock will not get the heat soak. I don't know of any other way to remove the heat and keep the bike quiet. You might be able to fabricate a heat shield, but not sure it will help much.
Just installed yesterday! Thanks again for this video! Were you able to fully insert the header pipe into the mid pipe? Seems sealed up enough but I do have a gap.
Yeah, I was able to get everything to full fit together with no gaps. I had to leave the header pipe loose to get it to fully fit, then I clamped it down before tightening the header. It took some work, but I was able to get it.
@@advmatt Thanks for the tip! I may give that a try should I run into any issues. I don't think I have any leaks, so probably ok.
Question for you: BDS says that this delete is not recommended due to losing power in the middle of the band. what do you think of that? I have already ordered your delete pipe and k&n filter. what do you think it will be like with the bds end cap added to that? will I need a fuel computer such as fuelx Lite or bds fuel computer do you think? thanks for the tips
I have seen the BDS stuff. The fuel controller requires the header pipe be replaced removing the catalytic converters. The new header is a straight through pipe. The resonator is required to maintain back pressure in this configuration. If you leave the stock header alone and only remove the resonator then everything is fine. You don't need a fuel controller if you only replace the resonator.
Thx for your video. Will this mod need a remap when used with the original Akrapovic pipe? How about the decibels?
No remap needed as long as you keep the stock header pipe. I have no idea how many decibels are coming out. I might try using a phone app to measure it. I will let you know.
@@advmatt Thx, much appreciated. The relentless enforcement in Holland and especially Austria and Germany on non-stock exhausts en noice makes me hesistant to modify the exhaustsystem others than factory specifacted accessories.
@@vtrrookie1 totally understandable. This modification didn't make the bike that much louder but it might not worth the risk.
With the shift-tech delete did you have to cut down the header and remove the second cat? I installed the Verex and that needed the second cat cut/deleted just to fit. It looks like the one you installed had enough space to not require that.
I did not have to modify the header pipe. The second cat at the of the header fit right in.
@@advmatt got the verex on and running, no tune required but it is louder than I expected. The pre-muffler is a resonator for sure. I think things will mellow as things settle in and I get tuned to it. Again, hope you are on the mend.
Shocks ( hydraulic dampners ) self generate heat in NORMAL operation and do not need any additional heat sources from a resonator. As the resonator having a large surface area actually does dissipate heat from the exhaust GASES the density of the exhaust gasses increases and reduces gas flow through the muffler. The weight savings are nice too. When in doubt " throw the resonator out ".......a little ceramic exhaust wrap helps thermal efficiency and weighs near nothing..
Well said!
Just curious, new rider here, id I bought a slip on exhaust for my bike would I have to do and new mapping or anything with the computer or anything like that??? Just curious as I was thinking about putting a new one on my bike but I'm not sure if the answer for this question
If you are only replacing the muffler and not the entire exhaust, you don't need new fuel mapping. Just swap mufflers and go ride.
Im trying to see when I have to reprogram the ECU? I want to purchase an entire Dominator exhaust but I can’t seem to find definitive direction for my best route. I don’t want to damage anything. The bike is brand new. As a side note, your videos are the best on the You Tube!
Thanks for the feedback. If you replace the entire exhaust you need a fuel controller to modify the air fuel ratio. From my research if you remove the header pipe that contains the catalytic convertors you have to keep the resonator to maintain proper back pressure. Check out the site Best Dual Sports. They have a fuel controller and more information on the exhaust replacement.
I'm assuming there was no engine code generated? If it was addressed in the video, I missed it.
There wasnt any error codes, and I think I forgot to mention nothing came up.
Hi Matt, I just got a duke 390 2021 and am confident it also has two cats like yours. The older models had one.
You mentioned that you don't think a remapping is necessary with just the presilencer (black box) removed. Did you see any errors come up after taking it off? What are your thoughts on me removing the presilencer and adding the optional Akrapovic exhaust? Do you think I still wouldn't need a remap or piggyback ICU? There's a CZcamsr called kickstand up that did the same as you with Akra exhaust and sounds pretty good.
Thanks for sharing👍
As long as you keep the catalytic converters, meaning header pipe, I expect you will be fine. The bike might be pretty loud with the Akro and resonator gone, but it might be a good loud. I have not had a single error code come up. I have also thought about replacing the muffler/silencer but havent yet. It's a future project.
@@advmatt Thank you
@@advmatt Black Widow de-cat complete exhaust can be fitted no problems and no re map.
@@mrnoisy4883 I will take a look.
Hi Matt Assuming no problems with inspection because you have original header with both cats still intact? Thanks Scott
I have never had my bikes inspected for emissions or safety, only for VINs. As long as my exhaust isn't ridiculously loud I am good to go. I have registered my bikes in California and New Mexico.
@@advmatt Good to know. New York state is cranking down .Every inspection station as of the new year has to have new updated computers "that they have to purchase" from the state and includes video feed. Could be as simple as resonator off.... resonator on again .. (temporarily) for some of us. Keep em coming!
Well, three months later and I expect you have put a few miles on this resonator removal... anything to add to your video? \No performance issues arising? I'm thinking of doing this for purely cosmetic purposes - I had hoped this bike would have some of the throaty "thumper" sound I used to hear out of 4 stroke motocross racers, but it is actually pretty anemic. I've seen video's on a variety of muffler changes from cheap to expensive, but most really make only a minor change in the sound. I'm thinking this mod, at a pretty reasonable price, is likely to have as much or more effect. Thoughts? (BTW, I've noticed you haven't done any light mods - is that because you don't do much night riding?)
I have around 2k miles without the resonator. No issues have come up and I think the throttle response is better. It definitely has a more thumpy sound than before. It sounds much better. I doubt I will replace the muffler. I try to avoid night riding as much as possible. I dont like it. My vision is too restricted, especially when wild animals can jump out at any moment.
Hi Matt! Do you have a link for the resonator replacement? May as well get the same one since you've had it for a while without issues. Thank you!
Try this link. shift-tech-carbon.com/onlineshop/product_info.php?products_id=2978
@@advmatt Thanks so much my friend! Can't wait to ditch this thing!!
The long bolt that goes thru the sleeve is hitting the frame where the footpeg attaches. How did u clear this to get the long bolt out?
Ah, yes, that bolt. I know the bolt. I grabbed with pliers and used a screw driver to pry it away from the point it was making contact. Try that.
@@advmatt i will try that tomorrow. Thanks so much for the quick replies and the advice. Greatly appreciate it.
What is that gasket called if I need to buy a new one? Thanks. Great video.
It's the exhaust gasket. You can get one online from KTM World or AOMC.mx. Look at the exploded views for the parts breakdown. You can find it there.
How is this pipe holding up cosmetically? I'm about to put one on and contemplating painting it black.
Did yours dull up any... closer to header pipe color?
I just looked at pipe. It is showing a little rust but I am out on the east coast right now. It look better than the header pipes do and certainly does not look as bad as some of the resonators I have seen removed. Overall, it looks pretty good. Once I return to a dry climate I will clean off all the rust. around the welds.
@@advmatt yep... East Coast also. Rust is a way of life out here. Think I may paint it before install. Thanks
I might have missed it in your video but do you still have the stock muffler?
I do still have the stock muffler. I didnt want to change it all at once. I wanted to see the effect of the new mid-pipe first.
@@advmatt Thanks. I don't have this bike yet but I've been thinking about it, and when I saw it in person the first thing that went through my mind when I saw that resonator is oh yeah, that's gotta go. Lol.
what year is your bike? Great video by the way, keep up the good work.
2020, I purchased August 2020.
Would you consider installing an o2 sensor eliminator?
I personally would not do that. The O2 sensor is part of the closed loop fuel map calculations. I am not sure how the EFI would function. The bike would have to be mapped with a fixed fueling map.
Did you see any power loss due to resonator removal,or any heat from running lean??Nice video by the way
I have not found any power loss issues. If anything, the throttle response is better. I havent had any issues running lean that I have experienced. No heat build up. The header pipe with the catalytic converters provide a lot of the back pressure.
Hello Matt, I am sitting here with a Dominator full exhaust in the floor... What are you long term thought in removing the resonator? Did you adjust to the sound just fine? And would you say there is any loss of low end? I read conflicting reports on the internet, but I have no idea how the folks commenting use their bikes, so I thought it best to ask the guy who really uses the bikes low end off-road. - Frank
I should have removed the resonator a long time before I did. The performance improvement was very noticeable in the throttle response. I did not notice any issues with a loss of power in the lower RPM range, however, I also know this engine prefers to be ridden above 4k rpms. I rarely if ever ride it below 4k, even offroad. I have made changes to how I ride to keep the rpms up, which also give the bike great throttle response. From what I have read and what I understand the issues arising from removing the resonator occur when the entire exhaust system is replaced with one that does not have catalytic converters. Without the catalytic converters the only way to establish back pressure is with the resonator. I have seen riders have to re-install the resonator because of this. I have read that if you use a fuel controller it is recommended a new header pipe be installed, without catalytic converters. Thus, you have to retain the resonator. In my case, I have not wanted to use a fuel controller for this reason and only removed the resonator. I think the results have been great this way. The bike is maybe 15% louder, I don't have a good way to measure this now, but completely tolerable. Hopefully this helps. Let me know if something here doesn't make sense.
@@advmatt Hello Matt, thank you for the update. I am going to install the full system, and the Fuel X. If there is a problem with back pressure, I can always go back. There is significant number of people funning full systems now, and it does seem (Despite what the manufacturers of most of the systems say...) that you do need a fuel tuner. - Frank
@@OneOldManRiding I look forward to seeing your results.
Curious if any additional feedback after the install? Any codes, etc?
So far no codes have shown up, but I havent had a chance to get many miles on it yet. First weekend of February will be a long weekend with 500 to 600 miles. Should see it then if any come up. The throttle response feels a bit better but it's hard to tell. The shock wont get overheated anymore. Top reason I did it.
@@advmatt thanks. That is the main reason I am thinking about it as well.
Hi Matt how is the fuel economy going since you removed the resonator compared to before
Good question. I am not sure I have seen much of a difference. I have been getting between 65 to 70 mpg now, but I was close to that before.
Excellent video mate, from the UK. I have recent bought a cheap £90 slipon exhaust so will be interesting to see how that performs. The reason I changed out the exhaust was not the sound, although this sounds amazing, it was the surging I got on the overrun when blipping down the throttle coming up on a junction. The effect of this made the bike jerky. I hope this helps it as I think it's excessive back pressure not allowing the bike to breath properly. Another option is an open airbox mod. I'm wary of making the resonator mod as the bike is brand new and it will invalidate the warranty. Tell me, has your resonator mod resolved that surging issue.
I have not experienced the surging issue you are describing. I prefer the way the bike accelerates now and how it sounds. There have been no engine error codes. Its running great. Cheers.
@@advmatt cheers Matt. Maybe it’s perhaps I have a new bike. I even thought it maybe the quickshifter or perhaps the heated grips but I’ve tested this and there is no problem there at all. I haven’t been out on the bike since I fitted the exhaust so when I do I’ll report back. One thing I have noticed it the engine recovery from reviving it stationary seems to be quicker now at least. If this doesn’t resolve it I’ll go down your route and remove the resonator like you as I think the excessive baffleing maybe partially causing the slow response. One of the great things about your video is showing how relatively straight forward the job is. Thanks Matt, your videos are packed with great tips.
@@advmatt So an update. I have now resolved the surging issue. It was the quickshifter. I asked KTM to take a look and they reprogrammed the system and now it's smooth as glass. Tell me, did you have to remap the bike or anything when you completed the resonator removal?
@@skydart60 good to hear you got the surging solved. I did not have to remap the fueling on the bike when I removed the resonator.
Hi, Where you bought gasket? pls link. Thank you
partsfinder.onlinemicrofiche.com/aomc/showmodel/13/ktmdb/903
Hey Matt, can I do this same procedure on my 390 Duke?
Yeah, I think so. I recommend contacting the company that sells the resonator to verify.
Would you have any feedback on torque or power after the resonator removal? Butt dyno works
Only by feel. The throttle response in the lower RPM range seems quicker but at the higher RPMs it feels the same.
@ADV Matt that's good to hear coz some people were worried of losing back pressure without the resonator.
@@mionggg if you remove the header with the catalytic converters you have to keep the resonator. Just changing the mid-pipe seems to be working well.
Ive done it wth an ali express one, that i had to remove the cat from the headpipe, but after that is sweet, much better than wat you show that has a strange turn. Great sound for the price, no engine light on. Then i installed a Slipon Leovince, but was too loud (nice sound but loud) so I installed the resonator back on. hope i can find something in between.
How do you think your experience would compare to using the Akra exhaust with baffle in?
@@KrazyKanucker much louder and cheaper. But finally I wet to a Leo Vince with the baffle as more quiet and more bass sound.
@@glaurini my mistake, I meant to ask what the sound would be like with Akra and presilencer removed compared to stock exhaust and silencer removed. Sound quality and loudness, ie db level?
@@KrazyKanucker yes. Much lower frequency. Nice bass sound but too loud. Like a mx bike. Is good if you only use it on excursion but not for everyday commute (at least for me)
@@glaurini thank you
Can you link a replacement gasket? Thanks!
Here is a link to the cutout page. You can order the part from here. aomc.mx/shop-ktm/oem-parts/?aribrand=KTM#/KTM/390_ADV_ORANGE_CHASSIS_-_2020/EXHAUST_SYSTEM/32ad20b3-3ac0-4de8-bb08-6ae6fb55a0de/390_ADV_ORANGE_CHASSIS_-_2020_EXHAUST_SYSTEM/y
Any tips on getting the bottom resonator bolt out? Mine doesn't want to clear the peg assembly.
I grabbed it with a set a pliers and used a large screw driver to pry it clear.
Thx @@advmatt !!
@advmatt, any tips for getting that bypass with the mounting tube back in the mount? The mounting tube the bolt goes through seems so tight that I can't wedge it back in.
@@tsdmoto I had to loosen the header pipe and nearly take it off to get the pipe to slip together and to get the retaining bolt through.
Thx@@advmatt , I had to tweak my hangar a bit to get it back in , I guess mine was extra snug when they welded it.
Can you please share with us the link of the cat deleter?
Sorry for the late response. Here is the link you can use. shift-tech-carbon.com/products/st3031-2-husqvarna-vitpilen-svartpilen-401-20-21-chamber-box-delete-resonator-replacement-ktm200-20-ktm-390-duke-rc-adventure-20
Great Idea Mike💡!
Can’t find that pipe on eBay. Could you please give me a link to the website? Best Regards 👍
Here is what I found on there website. shift-tech-carbon.com/onlineshop/product_info.php?products_id=2978
I think that any reduction in the weight of the bike is good.. I also think that the only way to increase power is to change the complete exhaust pipe together with the pipe.
I agree, for better engine performance it has to be the entire exhaust, but I have seen the new header that removes the catalytic converters still requires the resonator for proper back pressure. My primary purpose for the removal of the resonator was to remove heat from the shock.
@@advmatt first of all, thanks for replying. It's what I imagined, it's not just about taking off and putting on. I really liked his video, the explanation is detailed. greetings from MAZATLÁN, Sinaloa, México.
I m noticing increase in heat emated after installing this. The radiator fan seems to turn on more frequently than before. Can you throw some information about this.
That has not been my experience. I am not sure why the bike appears to be running hotter. Maybe someone else will see your comment and will be able to provide you with some ideas.
There’s only one reason that would be your bike is running a little later hence, hotter motor means you have to cool it down and will turn on more often.
I added the Coober ECU/Airbox/Header pipe kit to my 390. It seemed natural to try a bypass pipe and removing the resonator, so I did that as well. Unfortunately, I found the bike ran poorly under 4.5K and lost some of the gains I got from the Coober kit. After asking around (email exchange with Coober) I was told the resonator adds a bit of needed back pressure and removing it would indeed cause the low/mid range to take a bit of a hit.
I did a couple trips with the resonator off but in the end decided to put it back. Was a bit of a bummer as I really dug that audible attitude the bike had w/o it.
I saw a video about the cat free header pipe and how the resonator had to stay for back pressure. I think it's unfortunate that kit requires the resonator. It discouraged me from doing the Coober kit. Thanks for the comments with your experience. It's good to know about these different setups from riders using them.
did the headpipe added some more noise with the resonator in? looking for the Leovince one as i've the slipon of LV but is really quiet, and without the resonator is extremely loud. so looking something in between...
@@glaurini Not that I could tell as it seems most of the actual silencing happens in the resonator itself - adding the head pipe didn’t change much as compared to adding the slip-on.
I’ve wanted to remove the resonator since I bought my bike but I read that re-mapping the engine with an additional ECU (Coober) was necessary. SO, I’m really interested to hear how your bike performs going forward. I’m trapped under a couple feet of snow, so I won’t be riding for a couple months, at least.
Give us an update on the bike after you’ve put 500 miles or so on it.
Man, nice I live in Arizona, I rode my bike to the lake the other day, it was a nice 75 degrees !
I had removed the resonator as soon as I got my bike back in 2020. The bike breathes freely without the resonator. I didn't feel the need for remapping. The internal sensors are able to compensate for the change.
@@frewinfrancisis there any weird symptoms or anything so far
Thanks for your input, how's it behaving so far? And how about fuel consumption, did it increase dramatically?@@frewinfrancis
@@fransmukidi2255 ... nothing that I can notice. However, I went back to stock after the service centre said that I would void the warranty. Also, the resonator delete pipe was a DIY setup from welded sheet metal. So it started rusting pretty quickly and turned into an eye sore. But it was a pleasure to ride.
Hi, where did u get that straight pipe? im looking one for my rc 390
Shift-tech. Do a search and you will find them.
@@advmatt thx u
@@advmatt i also want to ask another thing but my english aint that great so please bare with me… so the pipe u bought has like a smooth edge, unlike maybe the cat pipe edge where u mount the bought pipe that has like a bump to the end for the clamp, inst it an issue?
@@massimo3860 no issues with this pipe. It is made for an easy install and quick replacement.
Hey buddy are yu still running on dat pipe??
Yes!
How’s your bike running after removing the resonator ? People tell me that resonator kills power on too speed and it damage your engine because it’s warmer
Bike ran so much better after removing it. Best engine mod for this bike. Also removes the heat from the shock, huge bonus. I think this is a must do modification.
Thank you so much
I bought this part, do you think I should do it for my 250 adv engine?
I don't see any reason not to. You can always re-install the resonator if you don't like it.
@@advmatt When you change the track, does it have a sweet sound? Is it too noisy?
@@makfkala it's louder for sure, but I like how it sounds. It's personal preference.
I dont know which gasket you wanted to replace. Can somebody tell me? At best send me a link or name it.
btw great video!
Exhaust gasket, between the resonator and the header pipe. I will look up the part number later and post it here.
What is your suggestion? Can I remove catalytic converter ?
First, let's make sure we talking about the same thing. The catalytic convertors are located in the header pipe. The part of the exhaust that is the large chamber that sits in the swing arm is the resonator, not a catalytic converter. The resonator has no effect on the emission controls of the bike. It is only used for noise control and adds some backpressure. So if you are talking about the resonator I can only speak to my experience on my bike. I have around 20k miles with the resonator removed and my bike has been performing perfectly. If you are talking about the header where the catalytic converters are located you will need a fuel controller if you change out the header pipe. The resonator removal is fairly simple and in my experience was worth it to me. Hope this helps.
I need to do that on my bike I’ve been worried about it
It has worked really well for me.
Do u have a part number for the gasket?
I dont but give me a few days and I will find it and leave a link here for you.
The gasket is listed here. partsfinder.onlinemicrofiche.com/aomc/showmodel.asp?type=13&make=ktmdb&a=904
Thanks Matt!!
I did the thing below 👍
Will this effect the bike’s warranty cheers
Probably, for engine issues. It won't actually cause engine issues but in my opinion if a company can find a way out of paying for a warranty claim it will. I can't say for certain.
Does it fit 2022 duke 390?
Great question, check with Shift Tech, it should say on their website, but I believe it does.
Thanks
If i put like this it will effect my engine?
No, as long as you keep the stock header pipe. Only replace the resonator.
@@advmatt actually i do the same thing to my bike ktm bike mechanic says it will effect my engine 😩 so i change it
@@THEPRASANNARAO7 ask why it will affect your engine. Get a thorough explanation. It might affect your warranty. I have almost 20k miles on my bike like this. Many others are also operating their bike like this.
@@advmatt okay boss thank you for information 🫡
is transfering the gasket necessary?
Not if you buy a new one, but you do need a gasket to keep from having an exhaust leak.
@@advmatt does exhause tape work as well? my gasket was destroyed in the process of chamber delete
@@stupidmilkshake4887 no, exhaust tape is not intended to work as a gasket. I recommend ordering one. It shouldn't be too hard to get.
Any suggestion on the part number or name of the gasket needed ?
Hi Man! It's me again. Just wanted to ask if, for this removal you had to install a high flow air filter or re-program the ecu on the bike? Thanks in advance!
No to either. Using standard filter and did not need to reflash the ECU.
Hey! You pain in the arse you! ;) Ever since you told me about your pants leg catching on the guard over the rear brake, I've snagged my pants cuff on the dern thing at least once every week. Before your video ... it never happened! What's up with that?!?!
...
I'll forgive you cuz I had a serious problem with fuses popping out and the bike not starting. After you reminded me to kill the engine with the kill switch and not the key or kickstand the problem stopped.
So ... I guess I'll keep watching your videos.
Thanks again,
S
Wait, what? I haven’t had this issue with the fuses. Do you remember in which video he discussed it? What was the problem? I always only use my key to turn off the bike, even when storing it 😳
@@I_Santos_ I don't know. It may just be a coincidence, but once or twice a week my 390 wouldn't start. I got just a click. I checked all my fuses and it would start again. Since I started using the kill switch, I haven't had the problem. Turn on the kill switch, listen to the slight whirring sound and start her up each time and no problem.
S
@@sdefiel3719 Hmm.. I haven’t had that issue, but I also haven’t had the bike very long and it was barely used when I bought it. But this is good information to know because if I ever experience this I now know where to look. Thanks for the tip, good sir!
@@I_Santos_ It turns out that I had a loose starter solenoid connection. It tripped a fuse occasionally. Tightened it up, no more issue, but I still start/stop the bike with the switch. Other folks prefer to do that for various reasons on various bikes.
S
Please when you spend a few miles commenting as it is the behavior of the motorcycle. It really is very interesting that you do not have to reprogram the motorcycle in a dynamometer. However, I have seen many people who when they reprogram the motorcycle is much better, you should try it once.
I'm so sick to death of people calling this thing a catalytic converter for this and other KTM bikes. You try to tell them otherwise and they just aren't having it. You ask them to look inside of it to find the catalytic converter and suddenly they go quiet. God damn, the internet is full of fools.
I agree. I tried to make that clear but some people still didn't get it.
Hey Matt, are you still running this pipe? I’ve heard folks say the bike will take a hit on performance if resonator is removed. I want it out of there and really value your opinion. Thanks
I wondered the same thing.. I did all of the BDSB mods and now I'm trying to decide if I want to get rid of the resonator.. I have been told by the owner of BDSB that it will kill mid range power and he has dyno results to prove it.. I think getting rid of the cats and keeping the resonator is the way I am going to go.
No friend. When you remove the cats the bike thinks the exhuast is longer. You can see this in the fuel map on a dyno. You actually loose 1 to 2 hp from 10 to 20% throttle an gain 1 to 2 hp at 100% throttle
This doesn't remove the catalytic converters. The resonator is a separate chamber. Did you dyno this bike with the stock header only removing the resonator?
Billion dollar company with engineering that placed that shock in that exact position. An you some random guy says heat kills it. THEY TOLD YOU YOURE KILLING IT! Like are you trying to convince your wife on purchace?
The 790/890 Adventures have also suffered from failed rear shocks. There are after market parts for those bikes that attempt to shield the resonator heat from the shock. The shock is taking an enormous heat load from the resonator. I agree I rode this bike right up to its designed capabilities which is why when I was riding it offroad, loaded at slow speeds and high engine RPMs the shock took a beating. Removing the heat load on the shock from the resonator is not a bad thing. I probably did kill the shocks the way I rode the bike, which necessitated modifying it such that the shock would not be subject to so much heat. Oh, last thing, I don't agree with the suspension shop that told me the heat from the exhaust would not stress the shock. After this video I saw sevaral other suspension experts say the opposite. Thanks for sharing your opinion. I appreciate the engagement. Also, not married, I spend freely.
I forgot to add. When these bikes are engineered they are engineered to meet Euro4/5 compliance. That does not usually mean the bikes are optimally engineered. Just something to think about.
Hi , how can i get the bend pipe in india
Maybe try Ali Express.