{"product_id":"yamaha-4es-25447-10-00-yz85-yz85lw-rear-sprocket","title":"Yamaha 4ES-25447-10-00 - YZ85\/YZ85LW Rear Sprocket","description":"\u003cp\u003eYamaha 4ES-25447-10-00 - YZ85\/YZ85LW Rear Sprocket is a motorcycle rear sprocket designed as an accessory part for service and maintenance purposes on select Yamaha off-road models.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Yamaha OEM fitment — precision-matched tooth profile and hub dimensions for a direct bolt-on fit\u003c\/li\u003e\n\u003cli\u003eManufactured to Yamaha's factory tolerances for consistent chain engagement\u003c\/li\u003e\n\u003cli\u003eReliable power transfer — precise tooth spacing reduces chain slap and uneven wear\u003c\/li\u003e\n\u003cli\u003eConfidence in fit — avoids the tolerance issues sometimes seen with generic aftermarket sprockets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cp\u003eThe rear sprockets are manufactured from 7075-T6 billet aluminum using CNC machining for precise fit. They feature a radial mud groove etched near the teeth to shed mud and grit, reducing weight and extending chain life. Sprocket sizes other than stock are intended for closed-course competition only and affect emissions and speedometer accuracy.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eFits These Yamaha Models\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYamaha Model\u003c\/th\u003e\n\u003cth\u003eCompatible Years\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYZ80\u003c\/td\u003e\n\u003ctd\u003e2000-2001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYZ85\u003c\/td\u003e\n\u003ctd\u003e2002-2027\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWhat is Yamaha part 4ES-25447-10-00?\u003c\/h4\u003e\n\u003cp\u003e4ES-25447-10-00 is the Yamaha YZ85\/YZ85LW Rear Sprocket, a motorcycle accessory part for service and maintenance.\u003c\/p\u003e\n\u003ch4\u003eWhat is Yamaha 4ES-25447-10-00 used for?\u003c\/h4\u003e\n\u003cp\u003eThis rear sprocket is used to replace or upgrade the sprocket on select Yamaha YZ80 and YZ85 motorcycles for maintenance and closed-course competition.\u003c\/p\u003e\n\u003ch4\u003eWhich Yamaha models fit 4ES-25447-10-00?\u003c\/h4\u003e\n\u003cp\u003eThis part fits Yamaha YZ80 models from 2000 to 2001 and YZ85 models from 2002 to 2027. Confirm the SKU and model year compatibility before ordering.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003eWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to \u003ca href=\"http:\/\/p65warnings.ca.gov\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eP65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":54191140667760,"sku":"4ES-25447-10-00","price":91.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/0107\/4494\/files\/RearSprocket.4ES-25447-10-00_0.jpg?v=1787079503","url":"https:\/\/yamahaonlineparts.com\/products\/yamaha-4es-25447-10-00-yz85-yz85lw-rear-sprocket","provider":"Yamaha Online Parts","version":"1.0","type":"link"}