{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"8b97c2559272","name":"TOP END PISTON & GASKET KIT 78MM KTM EXC-F 250 17-19, ATHENA P5F0780078001B, SET B","sku":"56-T1011.B_ATH","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":213,"formatted":"£213.00"},"summary":"ATHENA Top End Piston Kit includes a forged 4-stroke piston and top end gasket kit for optimal engine performance and reliability. The piston is manufactured using reverse extrusion and CNC machines from a special high-performance aluminum alloy with high silicon content, offering enhanced resistance and performance. Some pistons feature a molybdenum disulfide coating to reduce friction. The included Made in Japan piston rings have wear-resistant coatings for increased durability. Athena gasket kits are developed with extensive experience and technology, ensuring perfect sealing. Piston specifications: Bore Diameter 77.96 mm, Compression Height 19.40 mm, Compression Ratio 13.9:1, Displacement 250 cc, 2 segments, Biconical Piston Pin, Forged Piston Type.","attributes":[{"label":"Variant Id","value":"309806"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-T1011_2EB_5FATH/458ce90ce8486f18.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-T1011_2EB_5FATH/458ce90ce8486f18.jpg"],"description":"ATHENA Top End Piston Kit includes a forged 4-stroke piston and top end gasket kit for optimal engine performance and reliability. The piston is manufactured using reverse extrusion and CNC machines from a special high-performance aluminum alloy with high silicon content, offering enhanced resistance and performance. Some pistons feature a molybdenum disulfide coating to reduce friction. The included Made in Japan piston rings have wear-resistant coatings for increased durability. Athena gasket kits are developed with extensive experience and technology, ensuring perfect sealing. Piston specifications: Bore Diameter 77.96 mm, Compression Height 19.40 mm, Compression Ratio 13.9:1, Displacement 250 cc, 2 segments, Biconical Piston Pin, Forged Piston Type.","descriptionMarkdown":"### Athena Top End Piston and Gasket Kit\n\n This Athena Top End Piston Kit combines a high-performance forged piston with a complete top-end gasket set, engineered to work together for optimal engine performance and reliability. Athena meticulously develops and tests all piston technologies and materials in-house, ensuring perfect compatibility with their custom-engineered gasket sets. This integrated approach guarantees superior performance and maximum durability 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-silicon aluminum alloy, providing OE-level reliability with enhanced strength and performance.\n \n- Optimized Piston Profile: Features a smooth profile for consistent airflow and ideal flame propagation. Some piston skirts may include a molybdenum disulfide coating (applied by screen printing) to further reduce friction and improve longevity.\n \n- High-Quality Piston Rings: Includes Japanese-made piston rings with wear-resistant coatings (PVD or chromium nitride) designed to minimize friction with the cylinder, boosting performance and extending durability.\n \n- Reliable Gasket Set: Athena gaskets are developed based on extensive industry experience and constant technological advancement. They are produced to strict manufacturer parameters, utilizing state-of-the-art laser cutting for precision.\n \n- Advanced Gasket Technology: Athena employs a wide range of raw materials, applies surface treatments to address irregularities, and uses material stress-relieving processes to ensure superior sealing in critical areas.\n \n- Kit Includes: One forged 4-stroke piston and a complete top-end gasket kit.\n\n#### Technical Specifications:\n\n \n- Piston Bore Diameter: 77.96 mm\n \n- Piston Type: Forged\n \n- Number of Piston Rings: 2\n \n- Piston Pin Type: Biconical\n \n- Compression Height: 19.40 mm\n \n- Compression Ratio: 13.9:1\n \n- Displacement: 250 cc\n \n- Big End Pin Diameter: 16x9x38.2 mm\n\n Note: Products designed for increased displacement or power beyond national road code limits are intended exclusively for competitive use. Athena disclaims all responsibility for any use contrary to local regulations. Warranty claims for products used in competitive sports or high-performance applications may not apply unless a clear manufacturing defect is present.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/top-end-piston-gasket-kit-78mm-ktm-exc-f-250-17-19-athena-p5f0780078001b-set-b","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/8b97c2559272:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/8b97c2559272:1"}},"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."]}}