Stator coil, magnet coil, generator charging coil compatible with Yamaha YZF-R25 motorcycle and model year 2020.

This product is a magneto ignition coil (alternator coil) specifically designed for two generations of Yamaha mid-range sport motorcycles. It is fully compatible with both generations: First generation (2003–2005): Fits the standard YZF-R6. Second generation (2006–2009): Fits the YZF-R6S (also known in some markets as the F600 or R6 street version, optimized over the previous generation platform). Manufactured to the exact original factory specifications for each model year, this ignition coil delivers stable and efficient performance for the high-revving 599cc inline four-cylinder engines of both generations. It is the ideal choice for resolving ignition system issues and ensuring optimal performance on the road and track. 【Important Product Information (Generation Explanation)】 Compatible Models and Years: Yamaha YZF-R6: Compatible with 2003, 2004, and 2005 models. Yamaha YZF-R6S (F600): Compatible with 2006, 2007, 2008, and 2009 models. Important Note: The standard YZF-R6 (completely redesigned model) from 2006-2007 has a completely different design and is not compatible. Please check if your model is the R6S (street version) or the completely redesigned R6 (racing version). Engine Type: 599 cc, 4-stroke, inline four-cylinder, DOHC, high RPM. Function: This product is the primary power-generating component of the magneto ignition. At engine speeds above 15,000 RPM, the coil must operate stably and generate three-phase current to power the following systems: Electronic fuel injection: Delivers the precise operating voltage to the engine control unit (ECU) and the fuel injectors. Ignition system: Powers the high-performance ignition coil. Charging and auxiliary systems: This product charges the battery and powers all vehicle lights, instruments, etc. It is indicated for the following problems: This product corrects common faults due to damage to the stator coil of R6/R6S batteries: Unusually rapid battery discharge requiring frequent charging. Noticeably dim headlights and taillights at idle, with little improvement at higher speeds. Starting difficulties or rough idling due to low voltage after starting. Unstable power supply at higher speeds. Detection of an unusually low or fluctuating charging voltage.