I have in 3 years now not stalled my 2019 KTM 500 EXC even once, my old Yamaha WR450 used to stall all the time... But on my bike all restrictions has been removed and ECU reprogrammed for the full 58hp. Fully uncorked KTM 500 is a tractor that have huge power from bottom of rpm and no matter what gear you have it in when twisting that throttle, and even more power at the top :) (it has surprised me more then a few times with power wheelies at 110km/h when I was passing slow cars just by twisting the throttle...)

Just did this to my 2019 six days what a difference no more flame outs why KTM would sell a bike that was trying to kill you I have know idea

did you add a computer to richen up the mixture? how does it run?

@Keith Thurston you were able to put sxf header onto an exc-f

@@JustTip922I’m wondering the same

You're welcome.

Did u leave the emissions on or remove them I'm doing the same thing to my ktm 500 excf

Thank you for your kind words.

Hello: Glad to hear you rode your friends bike for a little enlightenment. The combo of removing the reeds, updating to the Vortex slavensracing.com/shop/vortex-10-map-ecu-husqvarna-vortex/ and changing out the muffler to a Graves slavensracing.com/shop/titanium-diamond-muffler-by-graves-motorsports/ or FMF slavensracing.com/shop/factory-4-1-rct-titanium-slip-on-exhaust-husqvarna-fmf/ will totally transform your new scooter. Enjoy the ride!!!

I'll install the boot to see if there is an interference issue. The reeds do NOT improve torque, not even a little bit and I realize they are for noise reduction.

Jeff Slavens how much louder are we talking about and power without doing ECU change on 2020?

Jeff please let us know if the SX boot rubs when you fit it. Also do you mind specifying the part number? Thanks for the video and I hope you recover from your injury soon.

MP I'm a JD dealer and have known those guys for many years. They are good honest, helpful and knowledgeable people so I hate to say anything negative about their tuners. All brands (there are several) of the piggyback tuners are made by the same company in Montana. I've tried them on 2 stroke and 4 stroke KTMs and have never been satisfied with the results. They help the fueling but don't go far enough and they don't make any changes to ignition timing or ignition advance curves like GET and Vortex ECUs. If your bike runs well you might want to adhere to the old adage, "if it ain't broke, don't fix it" .

Jeff Slavens thank you Sir!

You could just order the European market air boot for the exc without any restrictions.

SXF boot won't fit with the PDS shock. Need the euro boot.

Our maps are proprietary (not stock Vortex) and work well with FMF, XCF-W, Pro Moto Billet end caps and modified EXCF/FEs mufflers.

@@slaverace1can we run an sxf slip on as well?

Hello Dan: Aim & Vortex will find the end points after a short engine run time. The GET ECU can be set with the app.

@@slaverace1 Appreciate this, thank you.

Sorry. That model is not popular where I live at high elevation so I'll probably never get my hands on one.

Hello From the factory they are extremely lean and any mod you do to the intake or exhaust will make it even leaner. To correct the lean issue you MUST replace the ECU with a Vortex or GET ECU. There are NO cheaper solutions that are worthwhile.

Hello: Because KTM needs to be compliant with EU and US emissions standards, the programming only allows the ECU to make minor adjustments. I have an XCF-W that has different (richer) OEM mapping and I was able to remove the reed with no issue and my exhaust is stock, no restrictor. If you want your EXCF to run well, run cooler and last longer, buy the Vortex.

@@slaverace1 Ill get saving then. Thanks for reply

Did you ever do anything with adding fuel via programmer or ignition? If not your bike is running super lean

I have a eu model 250 exc f 2019. Are you saying that the intake is not like the us model ? Meaning it takes in more air? Thanks

ketchup sos yes there is no reed in the EU airbox

Cheers for that. What about the end screen cap on the muffler can I remove that without changing anything els ? Worth it ? Thanks

ketchup sos yes remove it. On the EU its even easier than the US because the screen is held by a nut. You can use the wrench that comes in your KTM tool bag (same nut size as you rear brake reservoir cap)

Oli M thanks brother 😘

Did you ever figure this out? Having same problem

Sorry, sometimes I don't explain things well. The SXF air boot is just a possible option. Just remove the reed cage, remove the exhaust restrictor (if your bike has one), install a Vortex or GET and let er rip! It's a huge improvement with the same smooth power delivery as stock.

Jeff Slavens thanks and thank you again for doing all the homework and explaining this stuff to us. Be safe!

Michael: With the butt plug intact, no offense intended but your 500 runs more like a well tuned 350 so I highly recommend removing the restrictor plate in the muffler. I have a 500XCF-W and the stock ECU is different than yours that has leaner fueling. You will need the Vortex or GET if you modify or change the exhaust and you will be a happy camper. It will not rip your arms off or make make it difficult to ride. The added torque and HP will make it easier to lug the engine for improved traction and enjoyment. If you need more help, let me know.

@@slaverace1 in the video earlier you referred to the O2 sensor with compensate to a certain point would this not help by just pulling the butt plug out? Love you videos by the way

Hello: Sorry, I'm not going down that rabbit hole. All unplugged, correctly tuned 500s have more HP than 99% of people can handle. If you think you're in that 1%, tape the throttle wide open and hang on. Let's see if you can ride it like a 125 pro rider. Please send the video!

Hello: Not sure exactly what you are talking about and I don't have time to review the video. If you are talking about setting up the ECU, the set-up procedure works on EXC-F models.

@@slaverace1 In the video you show holding the kill button,on the left side of the handlebar,then hitting the start button,on the right side of the handlebar,for about a second or so,the exc’s stock have a keyed ignition,and a stop/run switch,on the right handlebar only,there is no kill button on the left side.

Thank you.

Hello: Any mods to the intake or exhaust that increase air flow will require a different ECU.

@@slaverace1 tank you for your anwser 😊

Yes

Hello: Your bike did not come with reeds or a muffler restrictor. ECU companies do not offer anything for 2010 models. Take your bike to your KTM dealer and ask them to upload the latest map.

Removing the reeds will improve performance by increasing air flow but you must change the ECU to a GET or Vortex to add more fuel to match the air increase.

@@slaverace1 the O2 sensor won’t adjust for that?

Hello, It all applies to your 350. We have ECUs here >>>> slavensracing.com/product-category/electrical/ignitionecu-components/

Plug and play. The ECU will learn the TPS end points.

The Vortex does not utilize the o2 sensor. You can leave it or remove it.

@@slaverace1 thanks Jeff

@@slaverace1 Installed the Vortex ECU, FMF 4.1, and removed the intake reeds. Still experiencing flameout at low rpm. Any suggestions?

That procedure is for Vortex ECUs.

Do not remove the reeds or the butt plug without installing a Vortex, GET or Aim ECU. It will make it very lean and the Lambda sensor cannot compensate for that big of a change.

The mods in the video make it rip. I would leave the airbox alone.

Not everyone agrees and many want more HP.

It does not fit and not needed. Remove the reeds, add a Vortex or GET, mod or replace the muffler and let er rip!

Oh and I have a 22 500 exc-f

No. slavensracing.com/shop/vortex-10-map-ecu-ktm-vortex/ slavensracing.com/shop/get-rx1-evo-ecu-ktm/

DH, I think we still have kits or can get you one quickly. Call in next week and ask for Alec. He is out of the office this week.

I'm currently just using map 1 and no switches connected. I'll look and see if the OEM switch can be used by changing connectors.

I don't replace the air box or the boot.

Hello: It will make a moderate compensation but not enough to make it run well. If you want it to rip, install a Vortex slavensracing.com/shop/vortex-10-map-ecu-ktm-vortex/ or GET ECU slavensracing.com/shop/get-rx1-evo-ecu-ktm/ . I know, they are a little pricey BUT you will forget all about the cost after you are done wiping the smile off your face. They are really that good.

@@slaverace1 your the best! I buy all my stuff for my ktm from yal! I’ll purchase that vortex soon

@@Dirtpoorhomesteader Thank you!

Hello: The ECU can't be remapped. You will need a GET, Vortex or AIM ECU. slavensracing.com/?s=ecu&post_type=product

Tom: Most guys use map 1 but you can try other maps to see if you like them better. It's as simple as turning the clicker with a screw driver. Before making trim screw adjustments, we need more information. Please give us a call and ask for Alec.

@@slaverace1 Thanks Jeff!

Yes.

@@slaverace1 I've heard the o2 sensor is not used by the Vortex. Now I see it is used by Vortex? I don't know what to believe. My 2020 FE350s currently has no lambda/o2 sensor. I'm not sure if it would be better if I did install the sensor, haven't tried it installed after the Vortex. My bike does currently run much better than stock. Current setup: no reeds, exhaust screen still intact, vortex set to all 5 and map 1, no o2 sensor.

@@kyl3dr Sorry, I answered incorrectly. I called Vortex and the O2 sensor is not utilized. You REALLY need to remove the butt plug.

John In WV John, just use the method in the video.

@@slaverace1 I have a 2019 500 EXC with a Vortex. I have always heard the TPS doesn't need adjusted. I guess I should at least try this method, seems as basic as it gets.

Sorry, no. You will need a GET, Vortex or AIM Taipan ECU. slavensracing.com/product-category/electrical/ignitionecu-components/page/2/

Both units work very well. The GET has a lot more functionality with a lot of tuning options via the phone app but it's hard to beat the simplicity of the Vortex.

Never mind. I just saw your comments below about the JD tuners.

This is the current generation. It's a 2020. 2020, 21, 22 are all the same bike with different graphics. Looks like the 2023 will also be the same.

Yes. Those had a screw in type restrictor that can be easily removed.

Alleged performance products that do not improve performance and often degrade the performance.

@@slaverace1 I was looking for specific brands but understand if you don't want to put it out there.

kzfaq.info/get/bejne/rauRh9J5y6nFn5s.html

IF you have an EXC-F, it will be too lean with those 2 mods and will require an ECU update. slavensracing.com/shop/vortex-10-map-ecu-ktm-vortex/ OR slavensracing.com/shop/get-rx1-evo-ecu-ktm/

@@slaverace1 wow thx jeff for the fast response what your quick tought on those fuelprogrammer at cheaper cost i am canadian and your us product on cad dollar are way more expensive haha

@@North8078 I've tried piggyback systems several times over the last few years and have never been impressed. They are nothing more than a cheap Bandaid that does not get the job done. I don't understand buying a $11K - $12K dirt bike then taking cheap short cuts that lead to mediocrity. I'm sure guys will post their Bandaid system works fine BUT compared to what, a riding lawnmower?

@@slaverace1 hahaha got it i will see how the bike perfom stock but might buy a ecu pretty soon i really wanna open it up :)

For this application, no.

With the Vortex ECU, the O.E.M. map switch and traction control still work.

@@slaverace1 Thanks Jeff for the reply. 2 more questions. I purchased the Vortex ECU from Slavens ( haven’t installed yet cuz she’s getting bigger springs for my fat ass). You stated that the stock map switch and TC will still be operable. Which maps will they use when the Vortex is installed? Next question,,, just purchased the O2 sensor block out kit from you. Is it mandatory ( or a good idea) to remove the O2 sensor with the Vortex ECU and FMF 4.1 and the intake reed removed?

that guy is a snake oil saleman. Probably the same $700 package jeff referred to

Yes, a snakeoil special. Reducing the exhaust manifold diameter typically improves grunt at the very bottom of the powerband at the expense of reducing HP throughout the rest of the powerband. The trade-off is not worth the small gain for me.

@@slaverace1 ok thanks for heads up so his ecu are garbage ? only 200$

@@PackedandReadyFranco He does not sell ECUs. Those are just a piggyback system. You might want to listen to Korndogger's comment above.

He has and some of what he sells works such as the exhaust manifold and the ECU tuner (same thing as everyone elses, he doesn't have some super profile). But he also sells snake oil with things like the fuel rail. Even under full throttle the stock fuel rail supplies plenty of fuel to the injector. It's hard to believe him when you know he's actively deceiving people

Yes and yes.

@@slaverace1 Is that hooked up to the stock xcf-w switch via supplied cables?

@@DoctorGoodnight You're over thinking this. Just plug in the Vortex, set the TPS end points and ride it. There are no supplied cables. The OEM switch is plugged in to the OEM harness.

Hello: In the near future I'm going to re-install the OEM ECU and review how it works with the reeds removed. Please check back in 2-3 weeks.

@@slaverace1 Any updates on this? I have a '20 FE350 (non S offroad model) and wondering if I can yank the reeds and leave the exhaust/ECU for another day.

Jeff, did you ever try running with OE ECU, reeds pulled?

Hello: The one we sell from Mototerre is a bit different and gives a mild improvement. It has an internal twisted fin that directs the air correctly and increases velocity. We had many request for this type product so I found this one, tested it and put it on the site. It doesn't cure any issues and is not for everyone, but works well for guys looking for that last little bit of throttle response and HP.

@@slaverace1 ok thank you for clarifying. I was debuting taking my reeds out but I had no choice. The rubber seal blew off and the reeds were up against my filter. First time taking the filter off. Bike had 5 hours on it. So that ended that debut and there out. I bought a EJK, exhaust end cap and put a twin air power flow filter cage on and I’m not looking for any horse power. This bike you already have to hold the hell on lol. I just want the best running bike I can get. I had a 2019 Suzuki dr and that thing was rock solid. Never got hot, never stalled, never left me sit. And ran perfectly with idle set. I got the tuner and end cap to help reliably and the running not HP. if I could stay stock I would. But it runs like crap all bogged up. So would you suggest getting a intake tube if I have a EJK fuel tuner, reeds out, open exhaust end cap? Again I’m not looking for any power gains just smooth running.

I have not tested the air boot yet but I only expect a minor improvement.

@@slaverace1 the sxf air boot wont fit and rub against the pds shock because sxf uses link shock i believe

I need to know this as well

Any answers on this guys??

Chad: Thanks for the comment. We handle several products from Mototerre and he asked us to sell his version of the intake tube which has a twisted internal wing that increases velocity and aims the fuel better. Also, customers kept asking for them so we brought them in. I don't use one in my 500.

@@slaverace1 Jeff, thanks for the reply. That makes a little more sense now why you sell them. I have one of those velocity stacks in my 501, and to be honest I did notice a slight and I mean slight difference in performance. Thanks again for the explanation and thanks for the videos and products, I have the air injection dongle you sell and it works great, so keep up the great work.

I bought the Best Duel Sport intake velocity tube and had to modify it to set flush into the intake boot. Did it help ? No clue but it's not hurting either.. it's staying in either way. Lol

I have a 2020 fe501s and did not set the endpoints either. I thought you only had to do that with other year bikes.

@@Motorxkid1 I have a 19 500 EXC. I never did a reset with Vortex either. Trying it out today. I will try and report back any changes.

@@xnofriendsx I can't even do it with my bike since I have the fe501s

@@Motorxkid1 well for what it's worth I did that reset and it had zero effect. I thought my bike might be a bit off but it ran just the same. I thought the fe501 was similar to the 500 EXC. You can't do the reset? With a Vortex?

Did you notice any difference in between oem ecu and vortex? I just removed the restrictions on my 20 500excf but I still have the oem ecu on it

The XCF models are not plugged up but one of our ECUs will make it rip!

The Vortex and GET offer very similar performance. The GET comes with a map switch and has many more tuning options.

Hello: Sorry, don't know about UK spec bikes. We are in the USA.

Your bike does not have reeds or a muffler screen but we do have ECUs. slavensracing.com/product-category/electrical/ignitionecu-components/

Works great up to 8000rpm BUT at 8100 it blows up and shoots you to the moon like a rocket. Ha!

Yes

Thanks. So by replacing the air filter box the o2 sensor should self regulate with the ecu? No adjustment needed to accommodate for the greater air flow? Then the second step would be to get a vortex and reset the parameters as you demonstrated.

Vortex ECU will make it rip.

I have a jd Power commander. Not sure if that’s similar? Or even If it’s good. I have it set to what they say makes it run better

Our Vortex ECUs are preloaded with maps. slavensracing.com/?s=vortex&post_type=product

The bike in the video is a 4 stroke. EE only makes end caps for 2 strokes.

Yes

@@slaverace1 THX !!!

Hello: Vortex have always been plug-N-play, easy to install and set-up.

Jeff I got everything from you guys there a big help answering all.my questions and now my bike dose rip so much power and with the fmf pipe its loud and cars can hear me thank u so much I got your stickers on my bike and tell everyone about you guys thanks

@@ktmdays You're welcome. We appreciate your business.