Top quality (year 2004) Yamaha YFM25XS YFM 25XS Beartracker capacitor discharge ignition unit (CDI unit). CDI ignitions have become the system of choice due to their much hotter spark and ability to control spark timing through an internal computer. These units have the highest energy and best design today. One of the leading causes of CDI failure is a bad pickup coil. It is wise to replace it when replacing the stator.
OE # 4XE-85540-00-00