Trigger/Pulse Coil - Yamaha The MOOSE OFFROAD Trigger/Pulse Coil, part number M-21-503, is designed to deliver reliable performance and durability for Yamaha vehicles. Crafted with high-quality materials, this coil ensures consistent ignition timing, which is critical for optimal engine operation. Its robust construction provides long-lasting service life, reducing the need for frequent replacements and maintenance. Perfect for off-road enthusiasts and professional mechanics alike, this component maintains the integrity of your engine's ignition system under demanding conditions. Installation is straightforward, making it a convenient upgrade or replacement part for Yamaha models requiring part number M-21-503.Features:High-quality construction for reliable performanceDesigned specifically for Yamaha M-21-503 modelsEnsures consistent ignition timing for optimal engine operationDurable build for long service lifeEasy installation for both professionals and DIY enthusiasts