The motorcycle baffle is also known as "DB killer," which literally means "decibel killer." It "kills the noise" from the exhaust.
What is a DB killer baffle?
A motorcycle baffle is a product used to reduce exhaust sound.
It's typically a perforated long tube that runs along the exhaust gas flow path. The exhaust gases pass through it, where the exhaust noise is reduced due to the narrowing of the path.
Why install or replace a baffle in a muffler?
The purpose of the baffle is to reduce the noise to acceptable decibel limits that are comfortable for your ears and law enforcement.
From a legal perspective, the decibels produced by a motorcycle must match the original information of the motorcycle, available on the registration card and the vehicle's manufacturer plate.
Moreover, since 2019, new radars of the latest generations are being tested to penalize motorcyclists for "excessive noise." An additional fine higher than the cost of a DB killer is imposed.
Similarly, some roads are now prohibited for certain motorcycles due to their excessive noise...
Does installing a baffle impact the motorcycle's performance?
Stock exhausts come with motorcycle baffles or pre-installed DB killers designed to reduce exhaust noise and create backpressure on the valves, increasing engine volumetric efficiency.
Thus, according to manufacturers, using non-standard exhausts also shortens the engines' lifespan... Hence, the additional interest in using a motorcycle baffle.
How to adjust the motorcycle baffle sound?
Our motorcycle exhaust baffles have a feature of having a removable part at the end of the baffle. This removable part allows adjusting the sound volume you want for your motorcycle.
It's important to note that the two provided BTR-type screws screw onto the baffle. For a motorcycle that tends to vibrate a lot, we recommend adding a lock nut to ensure you don't lose the removable part and the motorcycle baffle.
How to choose a baffle?
The diameter, expressed in millimeters, represents the outer diameter, which must be smaller than the inner diameter of your exhaust. If your exhaust has an inner diameter of 36 mm, you should choose the 35 mm model.
For exhausts with intermediate dimensions, we recommend using the smaller size. The exhaust gases can escape more, but it still helps to reduce the noise. That is, if your exhaust has an inner diameter of 52 mm, you should choose the 48 mm model.
How to install the motorcycle baffle?
The motorcycle baffle is installed in the muffler.
Check the outlet diameter of your exhaust muffler where the baffle will be fixed to know the diameter you can choose