FMF 4.1 RCT Exhaust Installation + WEIGHT & SOUND COMPARISON VS STOCK -- 2017 KTM 500 EXC-f
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- เผยแพร่เมื่อ 8 ก.พ. 2025
- In this video, we show you how easy it is to install the FMF 4.1 RCT slip-on silencer on a 2017 KTM 500EXC-F. We also show you how much weight is saved with this titanium silencer over the stock exhaust.
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The installation of the FMF 4.1 RCT on the KTM 500EXC is very easy, takes less than 15 minutes and just requires the following tools:
-8MM Socket and extension
-Spring puller
-Flathead screwdriver
-Extendable magnet
-HiTemp RTV silicone
The second half of the video does a sound test comparison between the stock exhaust, an open header (which we do not recommend -- just for fun), the 4.1 RCT without the quiet insert/spark arrestor, and with the quiet insert installed.
To subscribe and follow the build and other adventure/enduro/truck videos, click here:
/ @sourceadv
---Build Details/Other Videos -- 2017 KTM 500EXC-f -- Ultra Lightweight ADV Bike---
Nomad ADV Tower and Lighting *Coming soon*
Mosko Moto Reckless 40 // Stinger 22 Rackless Luggage
-- • Mosko Moto Reckless 40...
EnduroSpec Suspension
-- • KTM 500EXC Ultra Light...
IMS 4.5 Gallon Tank
-- • 2017-2019 KTM 500 EXC-...
FMF 4.1 RCT
-- • FMF 4.1 RCT Exhaust In...
JD Jetting Power Surge Fuel Tuner
-- • JD Jetting Power Surge...
Dirt Tricks gearing and chain
-- • KTM 500EXC Ultra Light...
Sicass Tail Tidy and hand guards
For more about Source ADV, visit: SourceADV.com/
or Visit Source ADV Instagram: / sourceadv
Other Videos We Are In:
KTM 500EXC Vs. Sur Ron X
-- • KTM 500 EXC vs. SUR-RO...
with the spark arrestor in, it almost sounds a little more like a "purr" than a bark, very cool!
It sounds great with both, so thats cool!
Nice video, how about those directionals on the rear carrier, I want to get them.
The tail tidy is from Sicass Racing, cheers
Helpful vid but needs time markers for the sound tests. So here they are:
3:34 Stock Pipe
4:03 Open header
4:18 FMF 4.1 RCT without quiet/spark arrestor
4:49 FMF 4.1 RCT with quiet/spark arrestor
Do you know how many decibles that puts out with the FMF? Here in Ontario, organized rides use a sound checker before allowing riders to participate. I believe it's 95db or there abouts. If if goes beyond, we can't participate. Thanks again.
Thanks! At the last race I did with the full pass through spark arrestor i think it came out around 95.5 DB and the limit was 96. I actually mostly run the quiet insert is definitely much quieter because I’m trying to be nicer to my ears. Cheers
Hi there, I’m looking forward to your Nomad rally tower edit . I’m planning on a similar build later in the year for a 2021 adventure trip. Regards from the UK 🇬🇧 👍🏻
Robbo Robinson Hard Enduro-Media thanks Robbo! I’m just waiting on a little bit of hardware from the Nomad guys. Feel free to reach out from the website SourceADV.com if you have any questions. Rubber side down!
Finally got the hardware, hopefully will be able to install it this week or next. Thanks for waiting!
SourceADV nice look forward to it👍🏻
Sounds great thanks for sharing. I have the 2016 ktm 500 exc and have been wanting a new exhaust, love the sound of yours but what other fmf that's legal to ride anywhere and have the same throaty sound is there?
Most aftermarket exhaust modifications on bikes like these are not legal anywhere for highway use. Sorry to be a downer, but that's how it goes. For OHV use you have to have a spark arrestor on the bike. If losing the extra pound is not a big deal, there are higher flowing end caps that still have spark arrestors for the stock muffler. BestDualSportBikes.com makes one called the "STE-2 End Cap" and Fastway makes a spark arrestor end cap that you can get on their website or from RockyMountainaATV/MC.
The thing is, with these higher flowing options, you still should find some way to get the bike more fuel either through a JD Fuel Tuner, BestDual Sport Bikes Fuel Tuner, Vortex ECU, or ATHENA/GET ECU. We will be putting up a video in the next couple days on the JD Fuel tuner install and programming.
Let us know if you have any more questions. Sorry if that answer was more complex than you wanted. Happy Trails!
@@SourceADV you downer you! Jk, yes I've seen his end caps and thinking on pulling the trigger on one but not to sure yet, I'm really loving the pipe you have. I've been doing alot of research and think I can get away by feeding it more fuel just by adjusting the TPS. Bestdualsports also has the volt meter for that, I really dont want to add any extra electronics that can have an issue down the road ya know 🤷♂️. I definitely will be looking for your next video on the JD tuner.
Carbajal F best of luck in your decision! They are all better than stock ;)
Heres the JD Jetting Power Surge Tuner install :) th-cam.com/video/jYo3HwHGEIQ/w-d-xo.html
God dang man rev it up
hahah! Small neighborhood, sorry man!
What's the DB test really at w/ the 4.1 + quiet insert
Not sure man… 10% quieter than without roughly? Hahaha sorry dude.
@@SourceADV it sound sound test so assumed you did a sound test
Cool. Take care man
I changed the title to “sound comparison” to avoid future confusion. Hope that helps. Take care
Do u think I'll melt my stock blinkers on my excf with a pipe
Don't think so man, the blinkers are pretty far away and the pipes turndown should make the exhaust miss it. Cheers!
Did you notice any power improvement? Just curious if worth the 500-600 Canadian for the slip on
The power improvement comes from the combo of the slip on and changing the ECU. Current bike has an FMF and a GET Ecu, it is an entirely different bike (in a good way)
Where did you get the spacer from? My fmf doesn't have one and its a loose fit
Came with the pipe. Sorry to hear that. Contact FMF, they are pretty responsive, just incredibly backordered on everything
@@SourceADV ok thanks for the response!
@@koul_2482 no prob, good luck!
Hey, where do you add the silicon?
KTM Chris around the quiet insert so it doesn’t rattle and between the header and the muffler
@@SourceADV gotcha. Thanks for the fast reply.
KTM Chris no prob! If you are using the stock header there is a spacer to fit the bigger inlet on the muffler, so put you need to put some on the spacer too. Cheers!
@@SourceADV Ok will do. Thanks for the advice!
KTM Chris cheers!
do you know if a 2019 muffler will fit a 2020 bike?
No idea, sorry
What is the weight difference between the two?
I can’t remember exactly but it’s in the video somewhere. I want to say 1.5LB
It’s 1 LB 5 oz less
Lol "street legal".
KTM Chris 🤷🏻♂️🤷🏻♂️ haha