Compatible with the magneto-stator of the Yamaha YFM225 / YFM250 Classic Quad, original part number 59V-85510-20

This product is a magneto ignition coil assembly manufactured to original specifications and specifically designed for the classic Yamaha YFM225 (1986–1988 models) and YFM250 (1989–1991) off-road motorcycles. It is an exact replica of original part number 59V-85510-20, used to restore the ignition and charging systems of these vintage motorcycles. This product provides reliable ignition performance and basic charging functionality for these air-cooled engines, giving them a second life. 【Important Product Information】 Original Part Number: 59V-85510-20 Compatible Models and Years: Yamaha YFM225: Fits 1986, 1987, and 1988 models. Yamaha YFM250: Fits 1989, 1990, and 1991 models. Component Function and Importance: This product is an important component of early ATV magnetos and typically features an internal rotor. It performs the following functions: Ignition Coil (High-Voltage Assembly): Directly generates the high voltage required to ignite the spark plugs. Charging/Lighting Coil: Supplies AC power to the headlights and charges the battery (if equipped). Features: This older design integrates ignition and charging functions into a single assembly, providing a relatively simple and straightforward structure. Problems resolved: This product resolves common problems caused by aging, insulation faults, or overheating of the ignition coil pack: Engine won't start (no spark). Starting difficulties, rough engine running, or misfires at high RPMs. Defective or unusually dim headlights. Insufficient charging may occur when the battery is connected.