{"product_id":"athena-p5f0770039007a-top-end-piston-kit-for-yamaha-250-wr-f-yz-f-2008-2013","title":"ATHENA P5F0770039007A Top End Piston Kit for Yamaha 250 WR-F \/ YZ-F 2008–2013","description":"\u003cp data-start=\"0\" data-end=\"653\" class=\"PDq2pG_selectionAnchorContainer\"\u003eBreathe new life into your 4-stroke enduro engine with Athena's Forged Top End Piston Kit. Designed for riders who demand championship-level performance and long-lasting reliability, this complete rebuild kit combines a precision-forged piston with Athena's premium top-end gasket kit for a seamless installation and dependable results. Manufactured using a reverse extrusion forging process and precision CNC machining, the piston delivers exceptional strength, superior heat resistance, and smooth power delivery, while premium Japanese piston rings and Athena's advanced gasket technology provide outstanding sealing in the most demanding conditions.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul data-start=\"655\" data-end=\"1169\"\u003e\n\u003cli data-section-id=\"1uhg29p\" data-start=\"655\" data-end=\"743\"\u003eComplete top-end rebuild kit featuring a forged 4-stroke piston and premium gasket set\u003c\/li\u003e\n\u003cli data-section-id=\"8ex4e2\" data-start=\"744\" data-end=\"821\"\u003eReverse-extruded forged aluminum piston for maximum strength and durability\u003c\/li\u003e\n\u003cli data-section-id=\"3627m0\" data-start=\"822\" data-end=\"893\"\u003ePrecision CNC-machined for OEM-quality fit and consistent performance\u003c\/li\u003e\n\u003cli data-section-id=\"xpzjlk\" data-start=\"894\" data-end=\"993\"\u003ePremium Japanese piston rings with wear-resistant coatings reduce friction and extend engine life\u003c\/li\u003e\n\u003cli data-section-id=\"l5q0gm\" data-start=\"994\" data-end=\"1074\"\u003eForged side relief skirt design promotes smoother operation and minimizes wear\u003c\/li\u003e\n\u003cli data-section-id=\"szyh6o\" data-start=\"1075\" data-end=\"1169\"\u003eAdvanced gasket materials deliver dependable, leak-free sealing for high-performance engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp data-start=\"1171\" data-end=\"1184\"\u003e\u003cstrong data-start=\"1171\" data-end=\"1184\"\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\u003cul data-start=\"1186\" data-end=\"1295\"\u003e\n\u003cli data-section-id=\"16n0mx3\" data-start=\"1186\" data-end=\"1210\"\u003eForged 4-Stroke Piston\u003c\/li\u003e\n\u003cli data-section-id=\"1houatg\" data-start=\"1211\" data-end=\"1229\"\u003ePiston Rings (3)\u003c\/li\u003e\n\u003cli data-section-id=\"6aqmvn\" data-start=\"1230\" data-end=\"1254\"\u003ePiston Pin \/ Wrist Pin\u003c\/li\u003e\n\u003cli data-section-id=\"6wg6ph\" data-start=\"1255\" data-end=\"1265\"\u003eCirclips\u003c\/li\u003e\n\u003cli data-section-id=\"1j4tvgc\" data-start=\"1266\" data-end=\"1295\"\u003eComplete Top End Gasket Kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp data-start=\"1297\" data-end=\"1314\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul data-start=\"1316\" data-end=\"1566\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"1ust7c8\" data-start=\"1316\" data-end=\"1338\"\u003ePiston Size: 76.96mm\u003c\/li\u003e\n\u003cli data-section-id=\"1ejhbhu\" data-start=\"1339\" data-end=\"1360\"\u003eDisplacement: 250cc\u003c\/li\u003e\n\u003cli data-section-id=\"1dex8rz\" data-start=\"1361\" data-end=\"1388\"\u003eCompression Ratio: 13.5:1\u003c\/li\u003e\n\u003cli data-section-id=\"8zn354\" data-start=\"1389\" data-end=\"1410\"\u003ePiston Type: Forged\u003c\/li\u003e\n\u003cli data-section-id=\"1qyo7ls\" data-start=\"1440\" data-end=\"1474\"\u003eSkirt Design: Forged Side Relief\u003c\/li\u003e\n\u003cli data-section-id=\"1frzqmm\" data-start=\"1475\" data-end=\"1504\"\u003eCompression Height: 22.30mm\u003c\/li\u003e\n\u003cli data-section-id=\"afyesh\" data-start=\"1505\" data-end=\"1527\"\u003ePiston Pin: Standard\u003c\/li\u003e\n\u003cli data-section-id=\"1ga46yp\" data-start=\"1528\" data-end=\"1566\" data-is-last-node=\"\"\u003eBig End Pin Diameter: 16 x 10 x 42mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe ATHENA P5F0770039007A Top End Piston Kit is designed for Yamaha 250 WR-F and YZ-F models from 2008 through 2013. It provides a replacement piston kit for top-end service on the specified applications.\u003c\/p\u003e\n\u003cp\u003eBuilt for use with the listed Yamaha models, this kit is suited to maintenance and engine rebuilding work involving the top-end piston assembly. Confirm the vehicle model and model year before ordering to ensure the part matches your application.\u003c\/p\u003e\n\u003cp\u003eThis product is supplied as one unit. The ATHENA brand and P5F0770039007A part number provide clear identification for service records, workshop planning, and replacement-part selection.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: ATHENA\u003c\/li\u003e\n\u003cli\u003ePart Number: P5F0770039007A\u003c\/li\u003e\n\u003cli\u003eProduct Type: Top end piston kit\u003c\/li\u003e\n\u003cli\u003eApplication: Yamaha 250 WR-F \/ YZ-F\u003c\/li\u003e\n\u003cli\u003eModel Years: 2008–2013\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: Each\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ATHENA","offers":[{"title":"Default Title","offer_id":68128520995001,"sku":"227244","price":198.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/227244_1786043001.jpg?v=1793658315","url":"https:\/\/atticusgoods.com\/products\/athena-p5f0770039007a-top-end-piston-kit-for-yamaha-250-wr-f-yz-f-2008-2013","provider":"Atticus Goods","version":"1.0","type":"link"}