This ignition coil is a genuine Yamaha product, model 5UL-82310-10-00, suitable for use on YZ250F motorcycles manufactured between 2003 and 2009. It is an essential component of the motorcycle's ignition system, responsible for providing the spark that ignites the fuel. The coil is designed to meet the highest standards of reliability and durability, ensuring that your motorcycle will start smoothly and consistently. With this ignition coil, you can be confident that your Yamaha YZ250F is equipped with the best possible ignition system.