Standard ‘23 350sxf too loud

My yz250f stock was much louder than my FMF exhaust and the stock only lasted about 10 hours between packing.  FMF goes much longer between packing.

Seems odd. I’ve always felt that 350s are pretty tame with noise. An Akra with the insert is pretty quiet… maybe try that. 

23 sxf450 is also oobnoxiously loud

I went with aKro oonly bbecause its qquieter not bbecause it might make more power.

Autocorrect aabsolutely sucks

 Buy an Akropovic slip on 

Extremely quiet and durable, and increased bottom end on the 350.

Make all the fart wagons run a 30 pound DR650 Zookie muffler. 2 smokes could compete again.

Another vote for the akro. Have it on my MC350 and my sons MC250 is noticeably louder stock

Do the newer Husky versions still have the insert?  My 2019 was quieter with the baffle installed. 

My buddy has one on his 450 Husky and it is way quite compared to my stock 250F. He said he didn't notice any power loss.

If you live in NL, you are unofficially not allowed to buy anything except HGS, Dutch pride and all.

🤑🤣

Fill the air box with rags. Get it passed. Ride on. 

Whats ggoing on wwith Vital's autocorrect? Its fucked

If I use Microsoft laptop it's OK, can't post with android phone at all..useless 

 Yup, I'm on an aandroid phone. It jjust sstarted doing this a couple wweeks ago

Take the airbox lid off and put some insulation tape on the inside of the lid, it won’t hurt power and will help quiet it down overall. The airbox contributes some to the sound output.

Everything contributes! Loose bolts, etc.

Don’t know where you are buying your Akro, but if you are near Laurense Motors in Boekel,  go talk to Hans and see if he will cut you a deal…

Good price for the complete system.

You may need some high temp gasket silicone between the header and muffler, I had a small exhaust leak on mine…

I recommend pushing the exhaust manufacturers to tell you the sound data they have on their systems. That won't guarantee yours performs the same, but it should be useful. They have the sound data and won't publish it.

I would pay attention to the length of the silencer along the insulated core (longer will be quieter), and the diameter if the core (smaller will be quieter). These will be fundamentally critical. Otherwise, you're looking at a Helmholtz resonator system in the head pipe. If you get down to splitting decibels, you might try different end parts to focus the sound more, which would reduce the sound level at the microphone away from the centerline of the outlet.

Why are manufacturers producing motorcycles we can't ride? 

What next, selling airplanes without wings?

Did some work on a friend's 23 FC350 recently. I was surprised how much louder it is than my KX450. 

I am just speculating with no facts,  but is it a possibility that KTM is selling the bike with bare minimum muffler because they have come to realize that most riders replace them with aftermarket parts? 

Also the new gen black allloy muffler is much lighter and smaller than what came on the last generation bike, so it could be a weight saving trick?

Flame on….

One more thing: advancing the ignition timing reduces the noise exposure out the exhaust valves. I don't know of any mapping out there that focuses on this, but it is possible.