Upgrade to enjoy this feature!
Vital MX fantasy is free to play, but paid users have great benefits. Paid member benefits:
- View and download rider stats
- Pick trends
- Create a private league
- And more!
Only $10 for all 2024 SX, MX, and SMX series (regularly $30).
its good that KTM do this.
The 450's could produce 10dBA (half the loudness) less and still have plenty of power for 99% of riders.
The Shop
Sitting behind a bike with an fmf(or similar) pipe and no insert, on the rev limiter actually makes me dizzy. Like that feeling when you stick your head in a speaker at a concert.
but i took the spark arrested FMF Turbine Core off my bike and put on the louder Shorty and noticed a HUGE difference in power.
also i dig the throaty sound of my 300 two-stroke.
as for quieter 4-strokes, i'm all for it
Also, the most logical way to have reduced sound while keeping "enough" horspower, increase engine size and NOT allow modified exhuast! I know I know, the pipe manufacturers will be out of work. But this is a REAL solution rather than a tap dance around a solution so nobody gets "hurt"... financially.
At this point we need a horsepower "limit" coupled with exhuast DB's that nobody can complain about! What I mean by limit is you R&D motor size coupled with fixed satifactory DB until you reach the horsepower of current race machines, or current stock machines, but will have quieter bikes.
Example, you can quiet down a stock 450F and it will always have more power than a loud modded 250F! TRUE?
Maybe I'm wrong, I don't think so, but it won't be the first time
Regarding the Shorty swap the key question is what does this difference in power actually provide? Depending on the conditions more power can translate into less tractability.
300cc two strokes rule!
Two stroke noise doesn't travel as far as that low frequency four stroke rumble does.
WhKnuckle I hear you on the EFI and sound thing. Starting in 2008 over the next two years I built a Stealth and a Stealth Pro project bikes that MXA tested but never got to unfortunately build a Stealth EFI machine. Chad Sanner worked his magic and the Stealth Pro came in a 91 db under the static 94 db test. Was it as fast as Tyler Rattray's 200K PC bike that was also 4 to 5 db louder? No but it was fast enough plus at 91 db it was extremely quiet.
For those of you that aren't part of the quiet movement: Right on and I respect your position. Currently the FIM is driving the bus on sound and doing a great job on it IMHO. AMA Racing follows what the FIM does for sound regulations and typically following them by one year so Europe gets to test drive new sound tests and sound limits before we do.
There are less places to ride and race in Europe now and sound has been at the forefront of these battles. Zoning, dust, and other factors generally come into play as well but for the one thing that is the easiest to do is having sound limits to give our detractors one less thing to use against us.
The people who also cry about reducing noise levels will also be the biggest crybabies when their local track is gone because they feel they have the god given right to piss the rest of humanity off. I bet they smoke also. me me me me!
To Dr Sweden's point Akrapovic for sure is doing a great job in building a quality pipe but there are a number of factors at play here. Can't say enough about the motor maestros at KTM for building the right motor package that mates to the Akrapovic exhaust.
It is extremely hard to put a package together that delivers the right kind of power with low decibels.
EDIT: The disciplines you reference (MotoGP and NASCAR) race at dedicated racing facilities all take place at a facility that is already accepted in the community. What is the situation where you live with MX tracks and riding areas and noise?
Pit Row
Wonder how many people wear earplugs when riding now?
We always run to 94db. So many tracks have closed due to noise.
I have run Yoshi and now FMF pipes the last 2 years both pass sound tests with correct insert and the bikes have run better on them than the OEM pipe.
I do think the Jap OEM have been lazy at improving the tech involed in making the bikes quiet but still running great. Their idea just seems to be make them longer and the core smaller.
Post a reply to: Roger on KTM's quiet bikes