Posts
5968
Joined
11/25/2007
Location
Athens, GA
US
What's the scoop with this enormous resonance chamber on the factory KTM? It has "EVO3" stamped in the front but I wasn't able to dig anything up with a search. Assuming it's another way to quieten down the bike while improving power.
There's the usual resonance chamber further back, but I've never seen a four stroke header like this.
My first thought was roost damage:
Talk about “Boost Bottle”?!🤣
That scooter makes monster-torque and I’m guessing that mega-chamber has something to do with that.
It was talked about a little bit in PitBits a few months back. KTM tested it before one of the nationals to meet the up coming lower DB levels and Chase and Aaron liked it enough that they went racing with it that weekend.
Red Bull KTM has been running that since late Supercross this year. Yes, it’s for sound and part of their push to get their bike under the incoming 109db test, which has been pushed out until the 2027 season instead of the original plan to use it in 2026.
It supposedly helps meet sound requirements in EuroLand. Looks like a ding magnet to me. 🤣
EDIT: Still finished on the podium.
The Shop
Free shipping: VITALMX
Luxon 4-Post Bar Mounts
$189.95 - $239.95
When I was in the pit at the MXdN I noticed some of the KTM's had those. Maybe Lucas Coenen's? Looked like a damn 2-stroke pipe
That's like 2 stroke chamber status!
It's a purse, to hold all his money.
Been running it in MXGP all of 2025. I took this pic at Lommel.
Look like this?
I just want one of those Ti bike stands.
You can buy from from Ducati for $900. 😳
I'm surprised it made it through outdoors without getting smashed or a whole punched through ot. Just seems oriented in a way to invite that.
* Am I wrong that the Queen was gone for a while and now posting again? Maybe just me
Have you ever seen a two stroke?
Catalytic converters have finally arrived on race bikes!
😳 Holy Cow lol
Some early design drawings.
I'd bet that thing is a bit "pipey"
Looks gastronomical...
Pit Row
they ran them last year it isn’t anything new it’s for the new lower sound levels that FIM are going to and AMA will go to in the future.
I believe that’s what you call a fupa.
I'm curious to know what this sounds like...
This would be a good idea for a YouTube video, I would like to hear it too, and see dyno comparisons.
Link? I know a buyer! We’ve been trying to find a source for this KTM for a couple of years with no luck.
It will have pathetic low end torque for starters. Weak mid and top end, and poor throttle response.
KTM put a lot of R&D into that header to avoid it acting like a two-stroke expansion chamber
https://www.ducati.com/us/en/accessories/ACC013166
Swap the Ducati for KTM graphics
https://www.revzilla.com/motorcycle/akrapovic-mx-motorcycle-stand
Damn! The Ducati sticker cost $600 more.
It’s almost like people haven’t looked at a KTM until Eli got on one 😂
No shit they've been running this pipe since the last few races of SX and people are now just seeing this as new....
Post a reply to: Eli's header