Applicable Vehicle Models: Starter solenoid relay compatible with most for Yamaha models, for 2000-2006 YFM 400 Kodiak， 2000-2009 YFM 400 Big Bear, 2002-2008 YFM 660 Grizzly, 2006-2009 YFM 350 Raptor, 2004-2006 Bruin 350 YFM350, 2003-2006 Kodiak 450 YFM450, 2006-2009 WOLVERINE 450 YFM450 Attention: Please check the vehicle model before purchasing to ensure it matches your vehicle model Premium Material : Premium Material : The relay is made of copper coils inside, which has good conductivity, thermal conductivity, and high temperature stability; The external nylon plastic shell has compression resistance, insulating, and not easily worn, with a long service life Easy to Install: ATV Starter Solenoid meets OE standards and can be directly replaced with spoiled starter solenoid valves without the need for special tools, plug and play Buy with Confidence: If you have any questions about our products starter solenoid relay or models, we are always ready to address them. We wish you a pleasant shopping experience The core function of the Starter Solenoid Relay is to effectively direct the current in the battery to the starting motor when the motorcycle is started, thereby triggering the engine's starting process. Specifically, when the rider presses the start button, the contacts inside the relay will quickly close, allowing current to flow smoothly, thereby driving the starter motor to start working and ultimately driving the engine to start. Once the engine starts smoothly or the rider releases the start button, the contacts inside the relay will immediately disconnect, causing the starter motor to stop working.