{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"dcab74af29b1","name":"TOP END PISTON & GASKET KIT 77MM YAMAHA WR/YZ 250 08-13, ATHENA P5F0770039007C, SET C","sku":"56-T1003.C_ATH","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":224.71,"formatted":"£224.71"},"summary":"ATHENA Top End Piston Kit includes a forged 4-stroke piston with a bore diameter of 76.98mm and a top end gasket kit. The piston is made from a special high-performance aluminum alloy with a high silicon content, produced using state-of-the-art numerical control (CNC) machines. Some pistons feature a molybdenum disulfide coating on the skirts to reduce friction. The kit includes 3 piston rings, Made in Japan, with wear-resistant coatings (PVD or chromium nitride) for increased durability. Athena gasket kits are developed with extensive experience and use advanced technology for reliable sealing. Technical features: Big End Pin Diameter 16x10x42mm, Compression Height 22.30mm, Compression Ratio 13.5:1, Displacement 250cc, Piston Pin Type Standard, Piston Type Forged.","attributes":[{"label":"Variant Id","value":"309783"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-T1003_2EC_5FATH/3c1292c3fb8c761b.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-T1003_2EC_5FATH/3c1292c3fb8c761b.jpg"],"description":"ATHENA Top End Piston Kit includes a forged 4-stroke piston with a bore diameter of 76.98mm and a top end gasket kit. The piston is made from a special high-performance aluminum alloy with a high silicon content, produced using state-of-the-art numerical control (CNC) machines. Some pistons feature a molybdenum disulfide coating on the skirts to reduce friction. The kit includes 3 piston rings, Made in Japan, with wear-resistant coatings (PVD or chromium nitride) for increased durability. Athena gasket kits are developed with extensive experience and use advanced technology for reliable sealing. Technical features: Big End Pin Diameter 16x10x42mm, Compression Height 22.30mm, Compression Ratio 13.5:1, Displacement 250cc, Piston Pin Type Standard, Piston Type Forged.","descriptionMarkdown":"### Athena Top End Piston and Gasket Kit for Yamaha WR/YZ 250\n\nThis Athena Top End Piston Kit provides a perfect combination of two essential engine components for optimal performance and reliability. The kit includes a forged 4-stroke piston and a complete top-end gasket set, engineered to work harmoniously for excellent results.\n\nAthena meticulously studies, develops, and tests all piston technologies and materials in-house, while also engineering compatible gaskets. This precisely tuned kit ensures high performance and maximum reliability after a piston replacement.\n\n#### Key Features:\n\n \n- Forged 4-Stroke Piston: Manufactured using advanced numerical control (CNC) machines from a special high-performance aluminum alloy with a high silicon content. This provides OE-level reliability with enhanced resistance and superior performance.\n \n- Smooth Piston Profile: Ensures a regular flow and perfect flame propagation. Some piston skirts feature a molybdenum disulfide coating applied by screen printing to further reduce friction, boosting performance and durability.\n \n- High-Quality Piston Rings: Included piston rings are Made in Japan and feature wear-resistant coatings (PVD or chromium nitride) to increase durability and performance by reducing friction with the cylinder.\n \n- Reliable Gasket Set: Based on over 40 years of experience, Athena gaskets are known for their reliability. The kits utilize advanced technology, including laser cutting for perfect precision, and are produced following strict manufacturer parameters. Surface treatments and stress-relieving processes are employed to improve sealing in critical areas.\n \n- Combined Components: Offers the convenience and assurance of matched piston and gasket components from a single, reputable manufacturer.\n\n#### Technical Specifications:\n\n \n- Piston Diameter: 76.98 mm\n \n- Compression Height: 22.30 mm\n \n- Compression Ratio: 13.5:1\n \n- Number of Piston Rings: 3\n \n- Piston Type: Forged\n \n- Big End Pin Diameter: 16x10x42 mm\n \n- Piston Pin Type: Standard\n \n- Displacement: 250 cc","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/top-end-piston-gasket-kit-77mm-yamaha-wryz-250-08-13-athena-p5f0770039007c-set-c","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/dcab74af29b1:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/dcab74af29b1:1"}},"market":{"country":"GB","countryName":"United Kingdom","locale":"en-gb","currency":"GBP","exchangeRateFromGbp":1,"pricesIncludeUkVat":true,"checkoutTax":null,"delivery":[{"name":"Standard","description":"Orders £15.00–£59.99 · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":4.99,"formatted":"£4.99"},"free":false,"minimumOrder":{"amount":0,"formatted":"£0.00","gbp":0},"weightGrams":null},{"name":"Standard","description":"Orders £60.00 and up · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":0,"formatted":"£0.00"},"free":true,"minimumOrder":{"amount":60,"formatted":"£60.00","gbp":60},"weightGrams":null}],"storeUrl":"https://www.2brosparts.com"},"navigate":{"start":"https://www.2brosparts.com/api/agent","search":"https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus}"},"howToBuy":{"summary":"Build a basket for the shopper and give them one checkout link. Every URL is a plain path (no query string) and a GET. Nothing is stored between calls.","checkoutLinkFormat":"https://www.2brosparts.com/api/agent/checkout/GB/{basketKey}:{quantity},{basketKey}:{quantity}","steps":["1. Find products: follow links in these responses, or fetch https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus} (e.g. https://www.2brosparts.com/api/agent/search/GB/brake+pads). Every product has a basketKey.","2. Optional check: https://www.2brosparts.com/api/agent/basket/GB/{basketKey}:{quantity},{basketKey}:{quantity} returns stock, totals per delivery option and the checkout link.","3. Give the shopper the checkout link. Opening it fills their basket with exactly these items (replacing what was there) and opens checkout for United Kingdom. They pay on 2brosparts.com through Stripe."],"noFetchNeeded":"You can write the checkout link yourself from basketKeys and quantities; nothing has to be fetched first. Each product also has links.buyOneNow, a ready link for one unit.","stateless":"Nothing is saved on our side. The items part of the URL is the whole basket: to change it, write the link again with the new list.","itemsFormat":"basketKey:quantity pairs joined by commas, e.g. 04f24aad4d68:2,7c1e9a0b3f2d:1. Quantity defaults to 1. Up to 50 products, 100 each.","country":"GB is the shopper's delivery country. Swap it for theirs (US, DE, FR…) in any URL; currency, tax and delivery follow it.","tips":["Put everything the shopper wants in one link.","Optionally add your name as a last path segment on checkout links (…/checkout/GB/<items>/claude) so the sale is credited to you.","The checkout link is for the shopper's browser. Do not open it yourself.","Signed-in trade account holders see their trade prices at checkout."]}}