Kawasaki Ninja 250R/ Ninja 300/ Z250/ Ninja 650/ Z650/ Versys/ ER6N Regulator Rectifier. Direct fitment. OEM design and direct fitment. Provides Optimum required voltage of 14-14.2 V to regulate battery. Made of from high quality materials to manage thermal control and avoid overheating. long lasting performance compared to other cheap RR units which provide just 12V charging to battery.