This EJK Generation 3.5 is in excellent condition and was removed from a running 2015 Yamaha FZ07.

An Electronic Jet Kit (EJK) GEN 3.5 for a Yamaha FZ-07 is a piggyback EFI (Electronic Fuel Injection) controller that allows users to adjust the fuel mixture without needing a computer or dyno. It's designed to work with the stock ECU (Engine Control Unit) and provides a plug-and-play solution for tuning fuel delivery to optimize performance, especially when aftermarket parts like exhausts or air filters are added.