Best way to evaluate an exhaust’s performance is to look at a dyno sheet

Modern bikes are finely tuned machines. The exhaust plays a crucial role in this system. The number of aftermarket exhausts are endless. The best way to evaluate an exhaust’s performance is to look at a dyno sheet. The exhausts can have a significant effect on performance and the ability to carry a passenger. The other thing to consider with an aftermarket M4 motorcycle exhaustis how it will affect your passenger footpegs. Some bikers go the way of bolting a big bore no-name can on their bikes with the thought of cheap horsepower. The exhaust is specifically tied to your carb/fuel injection. They all make claims of better performance,style and sound. Depending on how the system mounts, it might require you removing the rear pegs. No-name exhausts typically are not correctly tuned for your application and can actually hurt horsepower and torque. When you change your exhaust it is critical that you have your carb re-jetted or your fuel injection recalibrated. So be sure to ask for a dyno sheet for the M4 exhaust. This should be inexpensive at the shop doing the pipe swap. Dyno sheets are available by most high end manufacturers, and they clearly show where and how the horsepower and torque are changed with the new pipe. This might not bother you, but it is something to consider.