Show us your 950 Rallye 2-1 exhaust systems

It is available.....very good

tapatalKTM

OK.... we need some more info, pics... please :)

Grazie!

You have to write to info@landmark.works.....Marco will give you every info about this wonderful kit.

tapatalKTM

Molto grazie Masso!

From my experience there is no hard and fast facts when it comes to exhaust and how it effects the torque curve.

Disclaimer:
In general we can be somewhat confident in speculating the outcome of a given design. In any case I'm sure actual dyno numbers can be proven to be just the opposite. So, the more I know about exhaust development and research the dumber I get.

My Opinion:
In general a system (as shown) will give a higher rpm torque peak, but a lot of this also depends on length and diameter of the primary header tubes. A non crossover or balanced system may also yield a torque curve that has significant dips and flats in the lower range of the RPM band often in an area that is used a lot in general riding.

Conversely a twin pipe system with a crossover or balance tube will yield a torque curve that is smoother/flatter and may be easier to calibrate the fuel characteristics with a carb or fuel injection.

ah! finally bit the bullet on a MSR 2 - 1 pipe, tasty!

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Fitup tomorrow morning...

Why the change A???

because...

Christ. Your not making soap are you Tyler???

Just came across this thread and wanted to thank you for the interest in the Twalcom system. Though it is relatively new to us, if you have any questions at all regarding the design of the headers, silencers, or anything else, please let me know. If there's something that I cannot answer, we can have the details from Italy right away.

Twalcom also has many Rally parts for the 950/990's that we may not have listed on our site. Please take a look at Twalcom.com, and if there's anything that you may be interested in, I can have a price for you right away and check availability with Italy as well. We usually order once to twice a month from them, so adding a special order will not be an issue.

PM me if anyone needs anything.

Thanks,
-Paul

Hi Paul

Do you have any dyno info with regard to your system? I'm interested to know how it perform with regard any benefits in torque production and if so where in the rev range it occurs. Also how does it perform being an unequal length system? Are there any pitfalls?

And a direct copy from the TT website with regard to their SS 2-1 headers (which look pretty good);

Over the past few years we have designed, tested and industrialized a wide range of accessories dedicated to racing and Rally Motorally. All accessories are directly derived from the experience gained on the race and refined through use.

Headers 2 in 1 TT® by Twalcom Racing 950 / 990Rally are the result of 2 years of racing experience and can be considered one of the best performing exhaust systems and technology for the KTM LC8 Twin.

2 in 1 Headers are made expressly for use Rally / Raid the specific intent to emphasize the maximum torque and maximum sweetness delivery possible. The engineers who participated in the project have calibrated dispensing directly on the test bench so that is not absolutely necessary to extract the DB Killer even when looking for the best performance.

In addition to being fully interchangeable with the original headers and does not require modifications or adaptations of the system, the headers 2 in 1 were also made to allow mounting an additional fuel tank on the left side of the bike.

AA.05.01849.002.003 - TT® by Twalcom Racing - Stainless Steel Headers 2 in 1 for Single Exhaust TT® Racing Right (Not Approved)

* Only for latest version Slip-On.

Please note: the replacement of the Headers the entire exhaust system will not be approved for road use.

Hey everyone, my apologies for the late follow up. Our main contact in Italy has been ill, and in the hospital, so we are just waiting for official specs from the MFG., however I at least wanted to paste their reply regarding the design of the exhaust:

"As regards the difference in length between the two manifolds (Front and Rear) first of all was calculated. The operating temperature is not affected. This can also be seen from the color of the two manifolds that is exactly the same index that the operating temperature is the same. If not the color of the rear header would radically change color dramatically tending to blue/purple.

Also consider that we are talking about a terminal designed specifically for Racing use according to the maximum lightness and also to mount on the left side of the bike an extra tank of 10 liters.
Beyond that is being built (still will need about 30 days) the new exhaust with a design much more attractive and Racing. Very, very aggressive!"
​

They will have more data for us ASAP. If anyone would want to consider a Pre-Order to be one of the first to have this exhaust on their bike, please contact me, and I'll be glad to help.

Thank you,
-Paul

Would anyone be interested in a North American made system?

Yes, tell us more...

Prototype?
Tuned length?
Material, pipe sizes?
Construction methodology, pipe forming...
Hangers and hardware supplied?
AU (Peso) cost?

$685AUD MSR 2-1 system, noice!



No fitting instructions but it's not rocket science... had to machine and weld up an adapter to mount my stealthy (inside out) Akra silencer which first involved cutting the slipon socket off, then welding the new 3 hole S/S flange in the correct alignment.

A bit of cut and shut on the G-IT bashplate right hand side...


Note this pipe came sans O2 sensor plugs (M18 x 1.5 pitch). Sourced those off ebay from Screaming Demon in S/S for $26 AU...



A very tidy rear end and some more weight gone


Other minor work required lengthening the 2 threaded bump stoppers for the centre stand so it didn't clash with the pipe... tweaking the Al' hanger bracket at the footrest mount. Now just need to beef up the silencer hanger bracket as it's not going to survive the inevitable 'dirt nap'.

Awesome sound!

1. Nothing yet.

2. Don't know. Most likely similar to what is out there now, as there is only so much room to work with. My goal is always simplicity.

3. Most likely 304 stainless x 18 gage (.045") wall. Diameter will be either 1.625" or 1.750" or maybe both.

4. For sure mandrel bent with possibly some hyrdoformed tubes in the mix.

5. Yes. If any sensor bungs are needed those can be added.

6. Don't know. This is dependent on (obviously) how many can be made. If there's enough interest I can go through the work and cost of drawing a custom one piece bend for each tube. If not it will be pieced together like the ones you see here. The one above for 685AUD is quite inexpensive. It's also far from complete. I usually make complete bolt-on, no hassle systems.

I would like to used the standard KTM silencer flange as then the end user can bolt up whatever silencer they choose. However I foresee different silencers might need different length hangers, so each customer at first would send in the silencer they want to use, I would then fit to that.

The one other part needed in this system is protection or skid plate. Possible modify an existing?

Hi WIsixfitty!
Sounds like you know your stuff, any pics of other pipes / systems made?
It'd be great to have options... and then maybe Pete640 will licence out the manufacture rights to his tanks... Hmmm?
Possibilities

Wow! Well done....
Can you give us more details about the akrapovic flange's adaption?
What have you done? Do you have any photo?
My idea is to adapt the original muffler because in Italy we have a biennal revision, according to the Street law.
So, till the ktm Adventure 990 is an E3, it cannot pass the exam without the original mufflers. So my idea is to made a flange and to mount one of the original mufflers in my bike only to go in the revision

Giorgio, I actually had a second S/S 3 hole flange plate made... waterjet cut just in case :)
I can send you a CAD drawing from which you can have the same cut and welded up to a slip on section of pipe to suit.
Will post some pics of the parts tomorrow (don't have my computer with me).