{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"543d9a8bcd13","name":"TOP END PISTON & GASKET KIT 77MM YAMAHA YZ 250F 19-23, ATHENA P5F0770212009B, SET B","sku":"56-T1007.B_ATH","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":233.38,"formatted":"£233.38"},"summary":"ATHENA Top End Piston Kit with forged 4-stroke piston and top end gasket kit. Includes forged 4-stroke piston with a 76.96 mm bore diameter and a top end gasket kit. Piston is made from a special high-performance aluminum alloy with high silicon content. Some pistons feature a molybdenum disulfide coating on the skirts to reduce friction. Includes 2 piston rings made in Japan with wear-resistant coatings (PVD or chromium nitride). Gasket kits are produced using the latest generation lasers for precise cutting. Technical features: Big End Pin Diameter 16x9.5x38 mm, Bore Diameter 76.96 mm, Compression Height 20.20 mm, Compression Ratio 13.5:1, Displacement 250 cc, Number Of Segments 2, Piston Pin Type Standard, Piston Type Forged.","attributes":[{"label":"Variant Id","value":"309794"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-T1007_2EB_5FATH/8387a6c5eb511f6c.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-T1007_2EB_5FATH/8387a6c5eb511f6c.jpg"],"description":"ATHENA Top End Piston Kit with forged 4-stroke piston and top end gasket kit. Includes forged 4-stroke piston with a 76.96 mm bore diameter and a top end gasket kit. Piston is made from a special high-performance aluminum alloy with high silicon content. Some pistons feature a molybdenum disulfide coating on the skirts to reduce friction. Includes 2 piston rings made in Japan with wear-resistant coatings (PVD or chromium nitride). Gasket kits are produced using the latest generation lasers for precise cutting. Technical features: Big End Pin Diameter 16x9.5x38 mm, Bore Diameter 76.96 mm, Compression Height 20.20 mm, Compression Ratio 13.5:1, Displacement 250 cc, Number Of Segments 2, Piston Pin Type Standard, Piston Type Forged.","descriptionMarkdown":"### Athena Top End Piston Kit 77mm for Yamaha YZ 250F (2019-2023)\n\nThis Athena Top End Piston Kit is engineered to provide a perfect combination of essential engine components for optimal performance and reliability. The kit includes a high-quality forged 4-stroke piston and a comprehensive top-end gasket set, designed to work seamlessly together for superior results.\n\nAthena develops and tests its pistons internally, utilizing state-of-the-art numerical control (CNC) machines. The pistons are crafted from a special, high-performance aluminum alloy with a high silicon content, ensuring OE-level reliability alongside enhanced durability and performance. Some pistons feature a molybdenum disulfide coating on their skirts to reduce friction, further boosting performance and longevity.\n\nThe included piston rings, manufactured in Japan, are equipped with wear-resistant coatings (PVD or chromium nitride) to minimize friction with the cylinder and increase durability. This kit ensures maximum sealing and reliability, benefiting from Athena's extensive experience and commitment to technological development.\n\n#### Key Features:\n\n \n- Forged 4-stroke piston for enhanced performance and durability.\n \n- High-performance aluminum alloy with high silicon content.\n \n- Includes a complete top-end gasket kit for perfect sealing.\n \n- Piston skirts may feature molybdenum disulfide coating to reduce friction.\n \n- Japanese-made piston rings with wear-resistant coatings (PVD or chromium nitride).\n \n- Designed for precise fit and maximum reliability.\n\n#### Technical Specifications:\n\n \n- Bore Diameter: 76.96 mm\n \n- Compression Height: 20.20 mm\n \n- Compression Ratio: 13.5:1\n \n- Displacement: 250 cc\n \n- Number Of Segments: 2\n \n- Piston Type: Forged\n \n- Piston Pin Type: Standard","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/top-end-piston-gasket-kit-77mm-yamaha-yz-250f-19-23-athena-p5f0770212009b-set-b","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/543d9a8bcd13:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/543d9a8bcd13:1"}},"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."]}}