Quickshifters gives you the opportunity to make optimal clutchless gearshifts and is by far the fastest way to change gear on a motorcycle. The sensor detects when you try to switch up and then sends a signal to the engine controller you use, for example. PowerCommander, which turns off the engine for about 50 milliseconds, allowing the next gear to jump in. Note, some quickshifters are stand-alone and can be used without additional accessories. Others require e.g. A PowerCommander to work, and in some of these cases (dualrow fuel injectors) additional modules QEM, SFM or Ignition Module are required. Please contact us. We will help you if you are uncertain.