The 2004-2006 Yamaha YRF-R1 ECU Ignition module 5vy-BO is a clip-on style module designed for street motorcycles. It features a black plastic construction with pin terminals and a maximum amperage of 20A. This unit, manufactured by Yamaha in Japan, does not require any programming for installation and is specifically designed for easy installation on Yamaha motorcycles. With a vintage part status of "No" and a California Prop 65 Warning regarding potential health risks, this ECU ignition module is a reliable and efficient choice for optimizing the performance of your Yamaha motorcycle.