Auto Sensing Motorcycle Exhaust Baffles. What’s That?

It’s a biker life reality. New Noise regulations in many states require lower sound levels from motorcycles. In many cities new noise ordinances are already in effect and are being enforced. Rocky Mountain Performance thinks that they have resolved (part) of the issue by allowing your aftermarket pipes to produce noise levels that will quiet down your bike at typical around-town cruising speeds to make you less of a target of your police officers.

It’s called “Quiet Riot Auto-Sensing Exhaust Baffles“. Baffles on the market are designed for only setting.  At higher RPM’s they are too restrictive and rob power and sound. Some Slip-On Baffles can be rotated a lever to change from quiet to loud, but of course you have first to get off your bike for the adjustment, just before you get caught with your pipes open.

“Quiet-Riot® Auto Sensing Exhaust Baffles” work with your existing exhaust to provide back pressure and noise reduction at lower RPM’s. but also less restriction and more growl at higher RPM’s. Rocky Mountain Performance claims that their unique baffles have an unique active element that moves in response to exhaust pressure to reduce restriction at higher RPM’s, improve both torque and horsepower in the midrange (the most useable part of the power band) over straight pipes.. Still, you should check your local state or city ordinances. Intrigued? Baffled? Call Rick on my behalf at 970-215-2515 or visit Rocky Mountain Performance.

Zipper's

5 Responses to “Auto Sensing Motorcycle Exhaust Baffles. What’s That?”


  1. 1 bikerspaceman Apr 7th, 2010 at 9:41 am

    Clever idea! Having done noise testing with various exhaust systems such as Hooker with the adjustable baffle and Supertrap with the discs, this could be a good system. It would be interesting to see both dyno and drive by noise test data on a bike with and without this sytem.

  2. 2 J Apr 7th, 2010 at 11:18 am

    Very cool idea- have seen this idea on some high-end sports cars, but this is a very cool application of it for bikes- I’ve refused to put on those ugly Supertrapp mufflers, but I know my baffles have killed performance

  3. 3 Fred X1 Apr 7th, 2010 at 2:21 pm

    is it steel? aluminum? nice idea if the mechanism doesn’t get clogged up, looks like it’s almost self cleaning. curious what the before and after sound levels are…comparison at idle, mid range and wot would be important to know.

  4. 4 Woody Apr 7th, 2010 at 3:50 pm

    Very cool if they hold up from carbon, etc. I like the TS “Hushers” though http://www.hushersexhaust.com/ because the baffles are operated by a switch that the rider can flick in an instant.

  5. 5 burnout Apr 7th, 2010 at 9:37 pm

    I am one of the few (in my area anyway) that doesn’t believe in loud exhaust. This is an excellent idea if it won’t clog. Beats the heck out of ramming a beer can up the pipe! peace

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