2011 FE390 Exhaust Choices

sanluissound · August 1st, 2020, 11:03 AM

Hello All! My ‘11 FE390 is stock including the factory Husaberg exhaust. I’ve been told by a couple of tuners that the stock exhaust is one of the first things I should swap out to let her breathe better. I can no longer find a new Akropovic and FMF doesn’t list my bike specifically. I’d like something on the quieter side and must have a spark arrestor. With that in mind - what do you folks recommend? Is there an FMF that fits but is not listed? How important would a new header be? Thanks for any input!

Noubazor · August 1st, 2020, 12:36 PM

I have this exhaust pipe and muffler on mine (version 570)

https://www.domaracing.fr/shop/fr/45...-fe-10-10.html

https://www.domaracing.fr/shop/fr/45...-fe-10-10.html

I have not yet been bored in the sound test while the lilmites are hardened

sanluissound · August 1st, 2020, 12:49 PM

Thanks Noubazor! That site does not reference the FE390 or my year (2011) but I’ll reach out to them and see if the 450 fits.

Rainerio · August 1st, 2020, 01:23 PM

You modify the stock muffler. Take end cap off use a rubber mallet when you do you'll see that it has a smaller pipe inside cut it off. put it back together and your good

sanluissound · August 1st, 2020, 02:22 PM

Thanks Rainerio! This may be a very good option. I don’t think my ECU has been flashed and besides the add on fan I think the bike is stock. I called some tuners I know and they all said there’s no more option to flash the ECU but a big pinch point in the whole affair is the exhaust and that a muffler change would help a lot. I ride at 8000’ - 12000’ regularly so want to her to breathe well. I’d like to add an EJK fuel controller as well.

Noubazor · August 2nd, 2020, 12:21 AM

390 exhaust = exhaust 450

Rainerio · August 2nd, 2020, 06:32 AM

I got a European flash done on my 570 back in 2012. You should look into that. A dealer did it for Me.

NoClassic · August 2nd, 2020, 07:17 AM

Factory re-flashes are very limited if not impossible to obtain here in the USA after some changes in policy from KTM. I believe it was primarily related to increased pressure from the EPA in terms of emissions from small gas engines. You best bet it one of the aftermarket tunable ECUs, JD Tuner, or adjusting the TPS a bit.

Mufflers from 450cc KTMs of the same era will fit. I had the KTM 4.1 RCT on mine and found it pretty cheap used.

Rainerio · August 2nd, 2020, 07:50 AM

As far as I can tell 390 450 570 mufflers the same never tept track of which is which. I have a lot 70* bikes. Maybe aftermarket are different?

sanluissound · August 2nd, 2020, 09:05 AM

Every dealer/tuner I’ve spoke with has said “No way!” to flashing now. It’s a legal issue of some sort. I don’t need huge gains, just want to uncork her a little and so much of my research has pointed to the muffler. I’m also interested in the EJK fuel controller - it gets good reviews and appears pretty basic re installation.

Good to know the 450 is essentially the same exhaust. My understanding is that at least the header is different on the 570 though it’s hard to believe that would effect the muffler.

Good tip re the KTM 450’s of the same era, I’ll be looking into that soon!

Thanks folks, I really appreciate the intel!