{"product_id":"athena-s4c05400016a-cast-flat-top-piston-kit-for-yamaha-yz125-53-94-mm-standard","title":"Athena S4C05400016A Cast Flat-Top Piston Kit for Yamaha YZ125, 53.94 mm Standard","description":"\u003cp\u003eThe Athena S4C05400016A Cast Flat-Top Piston Kit is designed for select Yamaha YZ125 two-stroke motorcycles from 1997 through 2004. This standard-size piston kit features a 53.94 mm piston diameter and a 14.8:1 compression ratio, providing a reliable replacement for worn or damaged original components while supporting proper engine performance.\u003c\/p\u003e\u003cp\u003eManufactured by Athena, this cast piston kit is developed for dependable service in motocross and off-road applications. Its flat-top design is intended to match the original engine configuration and help maintain correct combustion-chamber compatibility. The kit is suitable for standard-bore applications and should be installed after confirming cylinder condition, piston clearance, and the manufacturer’s service specifications.\u003c\/p\u003e\u003cp\u003eFitment includes the 1997, 1998, 1999, 2000, 2001, 2002, 2003, and 2004 Yamaha YZ125. Verify the motorcycle year, engine configuration, and required piston size before installation. The manufacturer part number is Athena S4C05400016A, and the vendor part number is 68-4862A.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Athena\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: S4C05400016A\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 68-4862A\u003c\/li\u003e\n\u003cli\u003eProduct Type: Cast flat-top piston kit\u003c\/li\u003e\n\u003cli\u003ePiston Size: 53.94 mm standard bore\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 14.8:1\u003c\/li\u003e\n\u003cli\u003eFitment: 1997–2004 Yamaha YZ125\u003c\/li\u003e\n\u003cli\u003eApplication: Replacement piston for Yamaha YZ125 two-stroke engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n1997 Yamaha YZ125\u003cbr\u003e\n1998 Yamaha YZ125\u003cbr\u003e\n1999 Yamaha YZ125\u003cbr\u003e\n2000 Yamaha YZ125\u003cbr\u003e\n2001 Yamaha YZ125\u003cbr\u003e\n2002 Yamaha YZ125\u003cbr\u003e\n2003 Yamaha YZ125\u003cbr\u003e\n2004 Yamaha YZ125","brand":"ATHENA","offers":[{"title":"Default Title","offer_id":67549832773867,"sku":"68-4862A","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/9c4a-5b8e8decbb90a.jpg?v=1790696028","url":"https:\/\/ctracingservices.com\/products\/athena-s4c05400016a-cast-flat-top-piston-kit-for-yamaha-yz125-53-94-mm-standard","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}