Exhaust Baffle DB Killer Removal KTM 390 125 250 200 1290Duke Exhaust
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- Опубликовано: 31 июл 2024
- If you want a louder exhaust for your KTM 390, 125, 250 or 1290 Duke then the cheapest way to do it is to remove the baffle. It only takes a few minutes and it makes a huge difference to the sound of your bike.
I use a 40mm hole saw. If you use a smaller one you risk hitting weld and it will take much longer to cut through. Also make sure that the hole saw is long enough so that the centre part doesn't hit the middle of the baffle.
To make this work - use the largest hole saw you can fit into the hole. Use one designed to cut steel (not wood) and make sure it's long enough (remember some have a centre piece which can hit the baffle before you cut through it).
This is stage one of the KTM Duke stock exhaust upgrade videos and is the starting point for transforming your bike
Apologies that the video is only in mono on the left.
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Авто/Мото
My left ear enjoyed your video
Thanks. I’m not sure why the sound is in mono only 🤔. Unfortunately since I’m deaf in my right ear I didn’t notice in editing 🤬. Skäl. David
Fine with meee
Yup, i thought the right side of my earphone stopped working😆😆😆
@@Thulldai same 😬
It’s just to test who is paying attention 🤔
I love the stock silencer of the new KTM duke 200, 250 & 390.
It's looks so good.
Stock silencers are pretty good quality, so if you like them, then no reason to change.
38mm worked as that was all I could find at the local hardware store. Also when cutting, after a few minutes the cutting will change from smooth to getting caught up on jagged edges. this indicates you have cut thru the material. Carefully proceeding to cut until only a little material is hanging on, use pliers and work it until loose and no worries about fishing it out or large amounts of metal shavings getting in the exhaust.
38mm can be difficult if there are large welds. Glad you got it through ok and great advice 👍. Skäl. David
Yeah I’m having trouble with a 38mm
This video is really informative and not many on these bikes at all so thanks a lot, I’ll take the advice of the decat pipe but keeping a baffle 👍
Thanks. Typically I run a decat, keeping the presilencer. This allows me to run any slip on I want - from quiet to loud without any risk of it being too loud.
Nice video mate...awesome.. 👍🏻
Thanks. Much appreciated. Skäl. David
Could you give me the specification about this (in 3:14 video) tool please? I’d appreciate. Thank you
It’s a 40mm hole saw for metal. For this job just a cheap one is fine. Skäl. David
Really awesome video, m going to do with my RC390, Thankyou
Thanks. Good luck with that. Skäl David
Very east and perfect result. Thanks 👍👍✌️✌️
Welcome and thanks 👍Skäl David
You got good stuff mate.
Thanks, appreciated. Skäl David
Great!!! I bought a Duke yesterday and today on morning remove original db killer as you.
Great stuff!
Nice video! I can’t wait to see the next one. Well, I have a question about the DeCat. When you do the DeCat do you have to add some device (like a micro computer, chip) to indicate the system of the bike that you are not using it?
Thanks. Yes, you do. I talk about it in the decat video. Though with decat most people including me mean cat and presilencer. ECU is locked which means you need an external device between bike and ECU. Skäl. David
Perfect sound!
It’s a good sound 👍
Just drilled mine out and it definitely sounds much better and doesn’t seem to have caused any low end power loss. I did notice I’m getting an occasional lean pop but the bike also popped before I drilled out the silencer.
Definitely going to pick up a piggy back ecu soon.
Sounds great. Yes, more pop is normal as the air flows more freely. Not always lean running. Pop is also caused when throttle shut off dumps unburnt fuel into the exhaust
Does anyone know if this works for the 2019 model?
2019 has the same exhaust. Skäl. David
Great video
Thanks. Much appreciated. Skäl. David
Nice vid. Thanks
Thanks, much appreciated Skäl David
Never seen someone use a hole saw for getting out a welded baffle before but it seems like a great solution. I was waiting for you to get that swarf out with a handful of throttle :)
Ah, I just can't tell you how tempted I was to do exactly that, but I could just see all the negative comments :D Skäl David
I'm stiil gonna buy the Akrapovic just because it looks sooo good on the duke 390
Nothing wrong with buying parts because they look good!
hai. i enjoy watching this channel... I wanted to ask if this video in particular can be applied to duke 690...and if is there a way to get rid of the ugly presilencer.
Thanks, much appreciated. I'm not familiar with the 690 stock system and not sure how it changed over the years so I can't comment on this particular mod. But there are certainly cat delete pipes out there so I suspect some of those will also delete the presilencer.
I've just tried this with my 1290GT. 51mm hole saw. what a nightmare!!!! saw would not touch it. ended up chain drilling with a 2mm coldest drill. sounds fab though.
Glad you got there in the end. Stock exhaust is quite high quality - not sure about the 1290 but I'm assuming that it's also stainless which is really tough to cut and you need a decent quality metal hole saw which is also long enough. But what counts is making it work, so fantastic! Skäl David
Hello from the Philippines... Do I have to replace my ecu for piggy back type if I will do like this exhaust?
Hello. Most people consider that unnecessary for this mod. KTM advice is that no change is necessary when fitting the more free flowing Akrapovič exhaust so I see little difference here. Skäl. David
Very informative as always. Thanks David. Why would you keep the baffle when you decat? Regards.
Because the decat makes the bike a lot louder. It depends where you live but I have to keep the baffle in on my Akra because otherwise it would be a police magnet 😂😂. Skäl. David
I have the full cat and premuffler delete with the db killer installed and it's too loud now. Take out the baffle and it would sound like a straight pipe.
Jeeeeeesus!!!!40mm lol I've just realized I've been using a 38mm and I've effed it lol why didn't i check out your vid sooner?!lol..thanks mate
Smaller works, just harder to cut through! Good luck! Skäl David
It really didn't i bought a brand new saw bit,lubed it with cutting oil..it seem to just chatter around because of the loose fit..anyway it stripped the teeth lol.after i seen your vid i went back and gotta 40mm and bingo haha it sounds waaaaaay better man!!
@@mattbowman3641 Yeah, the reason for going bigger is because you avoid the weld in the centre. It's stainless steel so very hard and will blunt the teeth - it's why I recommend as large as you can fit in there. Some people have managed it with 38mm but.... Glad you managed it! Great job!
@@MotoMirius cheers mate,same here!!I'm lovin' your 390 vids man.lol keep em coming!!🤘🤘i think my next step is a new bars setup and power commander 5 with k&n.
@@mattbowman3641 Thanks and sounds like a plan. Good to see that Dynojet have finally stepped up and now offer units for the gen 2 Dukes.
I want to see that new video to cut the exhaust 👌✊🤩
Coming soon Tony. Makes a much better braap than the stock exhaust even without the baffle. Skäl. David
Me too tony. I am waiting to buy another stock exhaust. Won't buy it until I have seen the stub cut. Can't wait much longer lol
I don't think my bm has an exhaust , at least I can't hear it 😀but the new bike makes up for it its got 3 👍🏻peace and love brother 👍🏻☮❤
Cheers Springy. What’s the expected life span of the new bike? 🤘. Skäl. David
@@MotoMirius Well, at least 3 months if it's going to be a long term one 😭 after all I've only had 51 bikes now all different and there's still hundreds to get through 👍🏻😁🤘🏻
Removing this adding k and n high airflow filter and coober high airflow intake lid coupled with a Powertronic ecu would I have to change map ?
If you fit the airbox lid then yes.
Does your Akropovic have a baffle in our out?
In. It was out until I did the decat. Then I needed to put it in to avoid being pulled over by every passing police car. Skäl. David
Nice vid. Keep on makin em.👍
Thanks. Much appreciated. 👍 Skäl. David
Hi.. can we change the tank of 2012 ktm duke 200 to 2020 duke tank..
I don't have a gen 1 but don't see any reason why not. You may need to make modifications to brackets and seat will be an issue
Sir what will happen if we cut the waffle in half and again weld it in?
It will be a bit louder. See my other videos on this exhaust. For example Removable Baffle DB Killer Stock Exhaust KTM Duke 390 125 250 ruclips.net/video/gFFVAkRvAoA/видео.html. Skäl. David
El sonido es mas ronco 👍q belleza...
El sonido es bueno Skäl David
I have a 2019 rc 390, I bought an akra and was disappointed when I found you cant just remove this when you like, it sounds pretty similar to stock sound. Would this be the best method or what other options are they. I wouldn't like to mess up a 500 pound plus exhaust. Great vid by the way. Also is this legal and fine for MOT etc.
Thanks Richard. The Akra baffle is removable and you can fit an aftermarket baffle that is louder than the Akra one. Akrapovic Exhaust DB Killer Removal KTM Duke 390 125 250 ruclips.net/video/LNWcvlGOdsw/видео.html
I will be making a video on making the baffle easily removable using the same system Akra used before Euro4 banned removable baffles once I’ve summoned up the courage to drill the carbon fibre.
The biggest change to sound levels will always be decat. Skäl. David
So did i get more tor. Or hp. If i do the same at my duke 390 or not?
Not that you will notice. Getting extra power normally requires adding little bits from several different changes. Some people have claimed a loss of power, but there is no one single simple answer (despite what some sellers might want you to believe).
good video :)
Thanks. Much appreciated. Skäl. David
Magnet on a stick would be a good tool to retrieve the baffle and clean up the cutting swarf
It's stainless steel - magnets don't work very well. But you can certainly use a stick and maybe some tape to achieve the same. Skäl David
Hi mate, if the dB killer is removed from the stock exhaust? Will this fail the mot?
Unlikely. Depends on the tester. Depends if you are running L plates or the bike doesn’t look well cared for. You might get an advisory - some consider that a badge of honour. The bike only gets loud when you decat it. Skäl. David
Is there a restrictor ring in the cylinder head on these bikes behind the exhaust header as on eBay a few engines have what looks to be a restrictor pushed in to the exhaust port
No, it's just the shape of the exhaust port. The main restrictor on the 390 is the dent in the header, which depending on who used the hammer that day in the factory can be quite large. The Tyga header shows no dent is necessary - but only fits a gen 1 system. Skäl David
Moto Mirius would it fit the 125 or would it be to big ?
Awesome 👏
Thanks, much appreciated. Skäl David
Owsm trick sir 👍
Thanks and welcome
Would WD40 be OK to use instead of cutting oil? Hope so! Or how about simple Motor Oil?
WD40 is a water dispersant not an oil. Use motor oil. Skäl. David
I know this is an old video but I was wondering what adapter your using for the hole saw?
It comes as part of the Bosch kit with the hole saws, it's just gripped in the drill jaws
First i thought that my left earphone isn't working 🤣🤣🤣
I'm glad to see that my test to see if you were paying attention worked :D Skäl David
@Mags64 I'm deaf i my right ear - I can hear sound coming from the left - I can't hear if the right headphone is making sound. The right headphone plays sound captured by the right mic channel and in this case no sound was recorded in the right mic channel - no inversion, that is sorted in the mic.
@Mags64 Ha, no problem, it's just annoying that it happened and I didn't catch it before it was published and it got locked down.
And now. How to put a DB killer to exhaust?? I cant pass inspection witout this
If you have a welder it’s pretty easy. Im not finding a commercially made DB killer small enough to fit. If there was it wouldn’t be too hard. I will be making my own instead because I can’t run the stubby version of this exhaust without one. Skäl. David
Hello, what’s the size of the bit you used ?
I use a 40mm hole saw
sounds good
Thanks. Skäl David
I had Gsx R 150, gsx r 125 people called it in euro. Can i doing it on my stock exhaust?
It LOOK i can do it, because the tip looks like your exhaust, but i have no idea about how it look like inside
I haven’t done it. It looks like you can and if you have a welder then you could try it and weld it back up if it doesn’t work. Hard to know until you do it as you can’t see the construction inside.
Great video. I did this a couple weeks ago to my 2020 duke 390 and it sound great. I just bought a Powertronics piggyback ECU and am wondering if I need a dyno tune or can I use the map they already have installed? This is the only mod I’ve done but I’m considering the Coober air box lid at some point.
Thanks. Their standard map should be fine. PowerTronic do great modules but you really need to be sure that the map matches your configuration. I would recommend the mapped units like that for more developed builds where you are looking to build power and know what you are doing. Skäl. David
Moto Mirius Which would you recommend I use instead of PowerTronic?
If you have the PT then use it but check that the supplied map works with your configuration. Normally this is OK but mapped units are better for track day and power builds. For street use where you are not monitoring the bike then something like a RapidBike Evo Exclusive is better in my opinion.
Will drilling a 1/4 inch hole in center of exhaust give the bike a little better sound and would I have to rejet carb?
It will give a better sound - but it depends what you think better sounds like. It doesn't have a carb, it's fuel injected and the ECU is locked out so you would need a piggyback to alter anything. For just that you are unlikely to need any changes, but if you are concerned then a basic piggyback will do the job.
Hi , does this change improve or worsen the bike's performance? I know that removing the db-killer changes the carburetion
Removing the DB killer will alter the carburetion but for most applications within the existing KTM fuel map. It is impossible to guess exactly what the effect will be for your bike. There are many variables which affect carburation and performance including fuel and altitude which would change the actual impact on your bike compared to mine, however if you are running a stock exhaust then I think you are overthinking this. Skäl David
Hello, old post but I have a question for you, I have a duke 390, 0km 2021 bs6, still in brake in. The vibration on the entire bike is insane, all the frame,, handle, foots, everything vibrates so much. Do you think un your opinion it may be an exhaust resonance or something? Or maybe something more serious. I like to do these things by myself.
Hard to say without seeing the bike - compared to my Sportster the Duke is silky smooth. All singles will have some vibration and more race oriented ones like this have more. But I don't notice anything particular - but then I'm used to the Sportster. It doesn't seem likely the exhaust would vibrate the whole bike.
Hi
You wouldn't happen to have a 2015 390 brake pedal that you wish to sell?
On the off chance.
Cheers
Unfortunately I don’t have one.
Hello, I would like to inquire about the model of the hole punch you use, because I am a Chinese duke 390 rider, I do not understand it in the video, so I take the liberty to ask if there is something wrong , Excuse me, because i use google translation. Thank you! !! !!
Hi and thank you for watching! The hole saw was Bosch but any good saw will be fine. Skäl. David
Moto Mirius
Thank you for your reply. I personally learned that it is a bosch hole opener, and also observed a 40mm diameter hole opener, but thank you for your reply! !! !!
Had any one tried older version exhaust on 2017 duke 390? Wondering how it sounds!
It has been done. It sounds exactly like a pre 2017 Duke! Skäl. David
Could you please share that link, if possible
I'm going to do that on my husqvarna 701 vitpilen someday when I have one.
That's a nice bike. Skäl David
@@MotoMirius i love it
Thanks
Great Video...Question....is there any concerns about the metal shards left in the exhaust from drilling?
That is why I removed them. But if you leave them I don’t see an issue. They will remain in place or be ejected without issue. Skäl. David
Thanks for your response. It really does make a huge difference!
I have tried this with the exact same hole saw but it's not going through 🤷♂️any tips
How easy and how long to cut depends on the thickness of the weld. If the centre of your hole saw has hit the baffle you will need a longer hole saw.
Why u don’t take out exhaust first, does do this on bench and after work just take on moto if u does it to throw out dB killer?
Because the bike is the best jig to hold the exhaust without damaging by trying to clamp it down on the bench. You don't really need to remove it to pull out the DB killer - it is possible to pull it out with a wire etc - but you will then need to be aware that it will fire all the metal cuttings out when you start it. Skäl David
Nice video, are going to do an update of the learning CPU you fitted?
Thanks John. Yes, it’s in the works. Just trying to get a broader spread of opinions from people who have them. Skäl. David
What would you recommend to increase sound on the 2016 Duke with stock exhaust?
No easy mods there without cutting and welding. Best would be replacing with a pipe and back silencer like the 2017 Dukes. Skäl. David
Can I installed 120/ 70 front or rear 160/60 r17 tyre size in rc 390
As far as I know the RC runs the same wheels as the Duke, but I don't have an RC so I don't know what clearance you have on the front mudguard etc.
Nice 👍 video you should use magnet 🧲 to pull the db killer to much better to hadel the way
Thanks. Stainless steel isn't magnetic. It's easier just to tip it out as you should remove the metal cuttings anyway.
Will it hamper the engine? and should it be done before 3000 km?
I suggest not before first service. So long as you have made no other changes, this is normally fine. Skäl. David
eny idea on " fixing" a stainless motad 4in1 ? i hate the restricktion on it !!
Motads tend to be welded so might be difficult. Depends on what it looks like. Skäl. David
@@MotoMirius yup its welded and in one with the 4into 1 ... skål and have a good one !
we also do that in Philippines after enlarging the hole we put fiber to make deeper sound we call that "kalkal"
Sounds interesting 🤔 Skäl. David
my comment got a heart❤
Nocturnal PlayZ of course. Great content 👍
oh thank you!!
Would this run well with no piggy back ecu? I will be running full stock system including cat
The Powerparts replacement Akrapovic slip on requires no adjustments so this should not either.
Hello David, does removing the baffle from a stock Duke 250 increase the back pressure and will it make the bike run lean causing future problems to the engine/the bike.
Is it must that I need a piggy back if I only remove the baffle from the stock exhaust or can I run on the ktm provided ecu...
OK. Most exhausts have back pressure - this isn't considered a good thing from a performance point a view but the result of a poor exhaust design. KTM have actually done a decent job on a stock system but they have to meet emissions requirements. Back pressure is largely going to be from the cat not from the baffle in the secondary silencer (since this is on the other side of the cat). In a stock system, removal of the baffle will probably have little impact on back pressure. The same applies to lean running - you can replace the stock end can with a powerparts exhaust from KTM which is more free flowing and KTM say will not cause lean running. I would not expect lean running to be caused by removing the baffle on an otherwise stock system and most people run just with the stock ECU. If you wish peace of mind or you wish to help smooth out the rough running at low revs on the stock bike then an entry level piggyback may be your solution. Skäl David
@@MotoMirius Thank you David...
My bike has no catylic converter. Will it be harmful in any way to the bike if I remove the DB killer as well? Thinking of doing this so I’d like your feedback. Thanks.
As a rule of thumb I recommend only one change if you want your bike to be safe. But it is easy to fit something like a FuelX Lite to keep your engine safe - engine rebuilds are very expensive.
bro when you record the audio just use the "mono" setting or just use mono settings in your editing program! you'll never get unwanted results that way. informative video tho.
Thanks. This is the only video I’ve had this problem with. If I weren’t deaf in my right ear I would have caught it in post. Skäl. David
@@MotoMirius oh my god I'm really sorry on behalf of all these hate internet trolls.
RP ha, no problem. It’s just very irritating that I didn’t realise until it was uploaded and live. Just one of those things! Skäl
@@MotoMirius consider a cheap lav mic. Would improve your sound in the videos a lot! I really enjoy your content!
I did this on my ktm duke 125, it sounds a lot better but I think it feels a bit slower, does the removal effect the acceleration?
Power tuning is a complex subject. I don’t think this has much impact on acceleration but you’d have do dyno runs before and after to really know. Skäl. David
@@MotoMirius dyno is much expensive than buying new aftermarket exhaust
Yes it is. But without using one you are only guessing what the impact is of any modifications. This is why companies like Akrapovic use a dyno when designing new exhausts. Louder exhausts sound faster but may actually be slower.
Does it harm engine by removing the stock exhaust Dp killer
please do let me know.
For most people, if it is the only change you have made then no. It's impossible to generalise because it depends if your engine already has a problem or if you live somewhere extreme where the bike is already running at the limit of its map adaptation. If you have a concern then fit one of the basic piggybacks. Bear in mind that KTM sell an alternative exhaust that is louder and more free flowing and KTM are very clear that this exhaust will not harm the engine and does not need any modifications.
I am not claiming to know what I'm talking about but even if it is a cheap exhaust, if you remove the restrictions would that not allow more exhaust to flow and therefore add more power? Assuming you aren't running lean or anything.
Exhaust tuning is a complex subject and it would be different if you’ve decatted the bike. But yes, in principle more flow is more power so long as you are also adding more fuel. In practice? 🤔. It’s not unusual to lose power with the wrong choice of exhaust. I’m doing this because I want louder so ant power gain or loss isn’t that important to me, and it would depend on your bike setup. Skäl. David
@@MotoMirius right on!
Thanks! Except of the sound, does the engine perform any different (smooth, backfire, etc.)? Some time ago I spoke with my KTM dealer about this. They told me one of their customers did this but then the bike was not running well anymore. What is your experience?
My experience is that there are no issues. With a system that flows more freely popping in the exhaust can happen on deceleration but this is an exhaust effect not a performance issue. There are many reasons a bike might not run well. Skäl. David
After are moving Db Killer Is the bike Performance Decreases?
Some people say yes, some people say no. Unfortunately bike tuning is not so simple and depends on many other factors.
Hi,
Great video. Will this work on all stock EXHAUSTS? I have a husqvarna vitpilen 701
It will work on many stock exhausts - but the details vary. It's best to take it apart first if it made up with rivets so you can how its constructed.
@@MotoMirius yea I checked... I would need a very long hole saw to get to it annoyingly as it is like a slanted end.....
I attempted this on my 2022 390 Duke a couple times unsuccessfully. The first time it turns out I had bought a wood hole saw so I went back out and got a 38mm metal hole saw along with the hole saw mandrel and that still didn’t work. Could it be that I didn’t use cutting oil or should I try a 41mm which is the next closest size available?
I think many people have made the mistake of not realising that there are different types of saw - this is stainless so it's harder than steel so it really needs a good saw for metal. Use a slow cutting speed not a fast one - oil helps to avoid the blades getting blunt so they keep cutting. What can happen is that the nose of the drill hits against the baffle - if this happens then you won't be able to cut any more - and it can take a long time anyway. Check that the drill isn't hitting and if so, see if you can move the saw a little bit further out - changing size of saw will only help if this is the problem if it is longer. Good luck, it should work for you.
did you end up cutting it?
Would this decrease performance at all? Like does it take away back pressure that the engine needs to run properly or something? Would you need a tune?
This mod should not require any change in engine mapping because KTM supply the more free flowing Akrapovič slip on and do not recommend any changes. Back pressure is important to power in these bikes, but back pressure is provided by the cat and the presilencer not the slip on. I haven't noticed any change to performance, but then that isn't important to me, so I'm not really looking for it. Skäl David
"I used heat gas welding to remove the db killer from exhaust of my KTM Duke BS6. I successfully removed it, but the heat caused two big holes in the exhaust net near the end of the exhaust. Will these holes make the sound louder or quieter? Could there be any problems with the exhaust or engine because of these two big holes? Please reply."
This is why I do not recommend that method of removing the DB killer. The heat will also have damaged the insulation in the silencer so you can expect it to be louder than it should be. It should not create any issues with the engine so long as you have made no other changes to the bike - air filter, cat delete etc. If you are concerned, get another silencer and try again or use something like the FuelX Lite to make sure the engine runs correctly.
Thanks for your reply. I want a louder exhaust. I was worried that it might cause any problems. Now you have reassured me. I appreciate you replying to my comment. You've got a new subscriber. Thanks, buddy!
Great video. I want to know. Will this affect the decompression of the engine
Thanks. KTM state that fitting the Powerparts Akrapovic slip on requires no changes to the engine - this does not have a bigger effect than fitting the Akrapovic
I bought the same cutter and tried it on my 390... after about 5 min of cutting I can barely see a cutting mark inside the exhaust.... I tried some expensive 4mm high end carbon drills to perforate the pipe (suitable for stainless steel) and even those struggle to drill through! (I used slow speed and enough oil). The exhaust seems to be very hard steel...
I’ve heard of people having trouble. Are you sure that the chuck isn’t fouling on the baffle? If the teeth can’t reach they can’t cut. It’s only 1mm steel but it is stainless so it will tough so it needs a hole saw for metal. Skäl. David
@@MotoMirius The part I drilled through looks like 2mm or more stainless... the cutter is made for stainless and not touching - it is a 38mm cutter - I can only guess I'm going through the weld inside too....
That’s possible and if you are using 38mm you are could be into the thicker part where it curves back into the baffle. I’d still double check you aren’t hitting the tip of the baffle
Volume normalization and that's the first time I've heard someone call it a-crap-o-vich 😂👌
Volume is now beyond my ability to correct, but at least you now know how the manufacturer pronounces it!
I thought my right earphone 💥
🤣
Do removing baffle leads to any engine issues?
If it’s the only change that you’ve made then normally no. Skäl. David
Hello David I really appreciate the information you share with us.
I’m looking for performance with a little bit of good sound so I’m planning to decat while keeping pre-silencer,stock exhaust and then tune it any advice.
Thanks in advance
Thanks, much appreciated. Decat will give you a noticeable increase in sound, but it will not be too loud. You can then fine tune the sound levels by changing/ modifying the slip on. If you want to ensure that the tune allows for the changes then I would looking at something like the FuelX Lite. If you want to actually tune the bike then you need to consider a full piggyback unit.
@@MotoMirius Thanks for replying,
I found out that there is a big difference in price between fuleX&piggyback dose that applies on performance too since I’m decating and removing the stock exhaust baffle only
@@aboodhusni1185 Yes, you get what you pay for. And with PT that is just the starting point since you would want to get the right map loaded. For the same reason you would not want to buy the FuelX Pro. But the Lite will do the job you need it to do.
David,
Do they make a dual exhaust for this bike? And if not, would performance be Affected if I made one? Does that make sense?
There are a couple of dual exhausts for the bike - IXIL for example, though I think most were for the gen 1 (but can be fitted if you use the gen 1 header). Exhausts affect performance to some degree so it would depend how good your understanding of exhaust dynamics is - it's certainly easy to to make performance worse. Skäl David
@@MotoMirius I worked in an automotive exhaust shop years ago so I kind of have a grasp on it. However I wouldn't want to affect any power performance just to have a cool looking pair of dual exhaust. I was just wondering. Thank You for the prompt response. God Bless
Does it works also on husqvarna 701 stock exhaust?
I've not seen a 701 exhaust in person. The chances are that something similar would work. Skäl David
Great job. I just bought used duke390, and I am getting inspiration from you. I am wondering what percent of the sound has been louder after removing it? In my country, the limitation is 105db. Do you think the sound would be louder than 105db? if you guess..
In my country, and most countries, the limitation is much the same. The difference is in how it is enforced and remember that it is louder at high revs so you have a lot of control over how loud your bike is when you ride - this is not a straight through exhaust and you have the cat, premuffler and still the slip on silencer so no, I don't think you will be over the legal limit
Will this mod give me power or response difference with Powertronic ecu ?
Not so much that you will really notice it - but power mods on this bike come from making a number of small changes to the whole system.
So what's better - de-beffle or de-cat ? you would lose torque and backpressure with de-baffle ? is the inside end of the baffle tube open ? thanks heaps
Define better? The bike has three silencers - cat, presilencer and tail silencer. Most of the sound reduction is in the cat and presilencer. Removing the baffle makes the bike a little louder. Removing the cat and presilencer makes the bike a lot louder. Most of the back pressure is created by the cat - back pressure from the baffle has to go back through the cat to get back to the engine. Tuning is a complex subject and will be affected by where you ride - altitude, temperature, humidity etc. Some people report loss of torque from removing the baffle others don't - but since no one has put the bike on the dyno before and after the change, these reports (and mine) are speculative. Baffle and cat are the only parts of the system that reduce sound by constriction. Most people make these changes to improve the sound of the bike, not to make it faster. Skäl David
@@MotoMirius Thanks for that... in my experience I've found bikes generally lose some torque when gutted for a better note. Whether its a crf250x or an MT07, you just notice it doesn't loft a front wheel as easy. So I guess in terms of better I just mean nice solid stock like performance but with a little more depth to the note. I can tell just from the RUclips videos that it certainly seems less constricted when revved without the cat(mini cat delete).. but not sure how far will be too far with the bike. Worried that the modified muffler will put me in ag bike land with a boggy feel and was hoping to avoid complete new slipon. (I feel like the pre muffler def. needs to stay)Appreciate your comments.
@@Superdisco199 This was an area I was attempting to address in one of my recent videos but going back into lockdown means I can't get back on to it. My experience is that the baffle removal on a stock system is no louder than the legislation compliant Akrapovic slip on that KTM supplies - my feel is that sound is similar once you debaffle and stubby the stock silencer. As I run a piggyback ECU, I would need to buy a bypass unit for that before I could realistically say what it does to torque. I've been told by someone who has used a dyno that best power comes from cat removal, leaving the presilencer in place and using the Akrapovic slip on.
@@MotoMirius Thanks for that. I just watched your ECU vid. Nice work. I just got the bike and took the whole secondary/final muffler off and it actually seemed to boost the power (wheelied in 2nd). But it had a pretty nasty backfire. Your first stage baffle removal didn't backfire did it ? sounds a bit like I might need to get the RapidBike Easy at the very least.. Bike seems pretty jerky (2020) down low and then flat spots and then comes good. Really suspecting that mini cat removal and single debaffle would be the best trade off, but it's really thejerkyness bothering me most of all. My 250F is carbed and reklused! :-D
No backfire but I always run a piggyback. Backfire is typically a sign of running lean but it can be normal if it’s just on the overrun when there is excess fuel dumping into a hot exhaust with no baffles to absorb it.
Hey a question = Will my cb650r have the same baffle system? Checking before sawing in
You should be able to check by looking at the back end of the silencer. Skäl. David
@@MotoMirius look into it with a flash or something? Thank you for fast reply!
@@MotoMirius I don't like the look of aftermarket exhausts but you gave me hope
@@MotoMirius I need help. . . ㅜㅜ
You will need to determine how the exhaust is constructed and how the baffle is held in. Many OEM exhausts can be modified but sometimes it is too hard. I don’t have a CBR650R so I can’t comment.
Can I use lithium grease as the lube to cut out the baffle ?
Yes, oil is better, but something is better than nothing, just use a slow speed and let the cutter cool down as stainless is a hard metal
How to remove Himalayan stock exhaust black cap
Do you have a link to that?
In your opinion, which is louder? Yoshimura alpha t slip on or this stock exhaust without db killer? I don't want too have too loud exhaust as it might attract attention of the police here in california. Thanks
Yoshi is probably louder. But it’s the decat that makes the bike loud not changing the slip on. Skäl. David
@@MotoMirius what if you drill small holes around the db killer instead of removing it? Will it make it louder? Just curious...
Angel Junior Cruzado yes. I mentioned doing this in the video. There are a lot of ways you can play with this to change the sound. I mention some more in my just published video. Skäl. David
But does this affect the engine back pressure in long term run ???
Most of the back pressure is created by the cat and presilencer. KTM wouldn’t be the exclusive sellers of the Akrapovic slip on which is more free flowing than the stock can if they believed there was any risk. But it’s your bike so you must make your own choice. Skäl. David
@@MotoMirius Thanks a lot brother... So im planning to remove the baffle .... Which is better than a costly exaust replacement ....
Any milage changes after removing db killer?
I don’t measure mileage. But as I will always say - it’s likely to make it worse because you will rev the engine more to hear it and revving the engine is always bad for mileage.
Does removing the baffle on a new 390 , harm the engine in any way?
It’s unlikely. Akrapovic slip on is more free flowing than the stock exhaust and KTM advise that no changes are necessary when fitting that. Skäl. David
@@MotoMirius I guess they have calculated the back pressure before hand and tested on dukes and made changes accordingly to the akrapovic i think. But do you know if it harms in any way if i remove the db killer as you know the fuss about back pressure maintained on stock exhaust?
Back pressure is important. But I suspect that you are overlooking the fact that this is the tertiary unit. Back pressure is primarily provided by cat and presilencer. If like me you have decatted the bike then it runs better with a baffle. Skäl. David
@@MotoMirius Well I didn't know that the back pressure are maintained on cat and pre silencer but I guess even if has slight changes the oem ecu map could adjust for small changes, right?
@@kenssnog2768 Backpressure has very little to do with the ECU map - back pressure has a different impact on the fuelling. Baffle removal increases air flow which alters mixture which does impact on the ECU map - and the ECU does have some ability to compensate for this.
Great video, very informative.
I have a Honda shadow 125 that I want to de baffle, 2 questions do you know if it is perfectly legal in uk? And would it cause any problems with future MOT?
Thanks
Thanks. MOT doesn't (yet) fail on louder exhausts - but I have heard of some testers who do. The solution is to take it to a different testing station who will give you an advisory instead. There are normally testing stations who are more in tune with cosmetic alterations for bikes. Of course running L Plates never helps (if you do). As for legality, if you get pulled by DVSA then it's an issue (but this is very rare and typically only happens at regular big bike meets in public places), the police less so - but again it gets attention and that can cause it's own issues because 125 riders are assumed to be less experienced and more likely to have poorly maintained bikes - so loud exhaust is a good excuse to be pulled over. This is especially true for the really badly debaffled 125s which are very loud - but in a very bad way, just like a car where the exhaust has fallen off loud instead of supercar loud - same volume of sound but one you don't want to hear and the other you want to hear - it's all in the tone and tuning of the sound (so you need to keep some silencing). Bad loud = pulled over by police, good loud and a bike that looks well maintained = not pulled over by police
@@MotoMirius thank you very much for that very helpful, personally I don't want to go silly loud I just want a bit more beef lol I'm still in 2 minds about doing this, i have the silver tail exhaust, are there any other options I could look at?
Thanks again
@@acousticwarrior7 Just a debaffle is not normally silly loud. I can't really say what options you have for the Honda, but if you have the silvertail, and the baffles are removable then you go custom and try different baffles. I use Pipewerx for this - to just buy baffles to size. I actually need to do this on my XVS because the current baffles are just a little too loud for my liking - I should have added in the first place that cruisers rarely have issues with getting stopped for being loud - it's sort of expected.
@@MotoMirius oh wow ok I never realized that you could actually get different baffles I thought it was literally there or not. And yes I guess you're right it is expected with a cruiser. I don't suppose you have a video showing the difference in baffles? And can any exhaust take any baffle?
@@acousticwarrior7 For an example of two baffles ruclips.net/video/LNWcvlGOdsw/видео.html Baffles are sized by the diameter of pipe they fit into. www.pipewerx.co.uk/webshop/accessories/db-killers-baffles/custom-baffles/
Not every exhaust is designed to have the baffles removed and emissions regulations are making it harder - which is what the video above is all about.
Super l'ami!
Skäl. David
lami gyud kaayo
Does Yamaha r15 v3 has db killer, can we remove it!!!
I don’t have an R15. I imagine it’s possible. Skäl. David
what kind of hole saw is that?? tried a regular metal one...the blades became round and fluffy! haha
You are cutting into stainless so cut slow with lubricant. And yes, use a decent quality saw because stainless is hard. Also make sure its as large as you can fit to avoid the weld because this is thicker.
Will there be any issues with the engine in the long run if we removes the db killer/baffle?. Also, can't we do this by the method of gas cutting too?
Normally no issues - see my latest video. You can also gas cut but the chances of damaging the slip on are higher as is the amount of clean up after - you will also find it more difficult to convert to a removable baffle. Skäl David
I tried to remove the baffle with a 38mm TCT hole saw(40mm is not available in my place), but unfortunately I couldn't drill out the baffle completely as the length of the hole saw is much smaller and hence the base of the hole saw is touching the tip of the baffle!. Can you please suggest me a way to get rid of the baffle?
@@waseemcr2785 The problem with using a smaller hole saw, and the reason I don't recommend doing it, is that you are more likely to hit the weld - this is harder to cut and there is more metal to cut. If you can't get a longer hole saw then I suggest seeing if you can adapt your current hole saw to give it a longer reach.
@@MotoMirius Today I went to couple of hardware shops to find out whether I could get a hole saw with over 40mm depth and I did found out one, but the problem with that saw is that it's diameter is just 32mm but length is around 50mm. Will I be able to get rid of the baffle using this hole saw?
@@waseemcr2785 I suspect your problem is that you are trying to buy at local hardware shops rather than online. A 40mm saw needs to be only about 30mm to cut through the weld (the issue is often clearance inside the saw with the centre of hole saw hitting the baffle not the outside length), the smaller the drill the more weld you will need to cut through. The saw you found should do the job but make sure it's capable of cutting metal as stainless is a hard metal.