Exhaust Noise

[bbmorey1]

I have a 2006 Apex RTX with only 400 miles on it, didn't get to ride much the last couple years. I was out on Saturday and noticed on our way back that at low speeds around 20-23 and 5-6K Rpm the exhaust noise had increased 2x+ what it was. It first I though I was nuts but as I continued to ride i thought it was annoyingly loud. I switched with my wife for a while and couldn't believe how much quieter the viper was. Is this noise that started the headers or the y pipe? Not enough miles to be having this issue! I took the headers off and I don't see any cracks. Any and all thoughts appreciated.

 

[SumpBuster]

See my post about failing donuts and if the noise is what you hear. They can be kind of loud normally, if you are not used to the harmonics. But I think age of the donuts also plays a part in thier failure, if that's your case...did they look ok? Sounds like you had it all apart. If it's ok...run it. They do tend to get a little louder as they break in.

 

[danq]

I don't think it is problems with the donuts with only 400 miles on the sled. I think it is the "normal" drone or resonance these sleds seem to have.

My only advice is to not drive at that speed, go a little faster and it goes away. Many have tried to fix the problem, but I don't think there is a solution.

There are ton of posts on the issue. Here is a place to start your search.
http://www.ty4stroke.com/viewtopic.php? ... =resonance
http://www.ty4stroke.com/viewtopic.php? ... ight=drone

 

[mbarryracing]

There is an exhaust drone in that range, also seems to change tone with ice / snow buildup after sitting during dinner, etc. Not sure if it's temperature sensitive either.