{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"14d1b20d56cc","name":"PISTON KIT B 77MM KAWASAKI KX 250 17-19, ATHENA S5F07700006B","sku":"56-W9952.B.ATH","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":166.55,"formatted":"£166.55"},"summary":"ATHENA Forged Piston Kit B 77mm for Athena and OE Cylinder. Piston diameter is 76.97 mm. Manufactured from a special high-performance aluminum alloy with high silicon content for reliability, resistance, and performance. Features a perfectly smooth profile for regular flow and flame propagation. Some pistons have a molybdenum disulfide coating on the skirts to reduce friction, enhance performance, and improve durability. Piston rings are produced in Japan with wear-resistant coatings (PVD or chromium nitride) for increased retention and durability. Kit includes piston, pin, circlips, and piston rings. Technical features: Big End Pin Diameter (mm) 16x9.5x37.4, Bore Diameter (mm) 76.97, Compression Height (mm) 19.90, Compression Ratio 13.7:1, Displacement (cc) 250, Net Weight (Kg) 0.17, Number Of Segments 2, Piston Pin Type Biconical, Piston Type Forged.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77.00mm"},{"label":"Variant Id","value":"289761"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W9952_2EB_2EATH/9371c86707b4f266.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W9952_2EB_2EATH/9371c86707b4f266.jpg"],"description":"ATHENA Forged Piston Kit B 77mm for Athena and OE Cylinder. Piston diameter is 76.97 mm. Manufactured from a special high-performance aluminum alloy with high silicon content for reliability, resistance, and performance. Features a perfectly smooth profile for regular flow and flame propagation. Some pistons have a molybdenum disulfide coating on the skirts to reduce friction, enhance performance, and improve durability. Piston rings are produced in Japan with wear-resistant coatings (PVD or chromium nitride) for increased retention and durability. Kit includes piston, pin, circlips, and piston rings. Technical features: Big End Pin Diameter (mm) 16x9.5x37.4, Bore Diameter (mm) 76.97, Compression Height (mm) 19.90, Compression Ratio 13.7:1, Displacement (cc) 250, Net Weight (Kg) 0.17, Number Of Segments 2, Piston Pin Type Biconical, Piston Type Forged.","descriptionMarkdown":"### Athena Forged Piston Kit B 77mm\n\n This Athena Forged Piston Kit is engineered for superior performance and durability in off-road motorcycles. Manufactured using advanced reverse extrusion and cutting-edge CNC machining, this piston ensures exceptional dimensional accuracy, with tolerances less than 0.01 mm. It is constructed from a specialized high-performance aluminum alloy rich in silicon, offering the reliability of Original Equipment (OE) pistons with enhanced strength and performance.\n\n The piston features a smooth profile designed to optimize airflow and ensure perfect flame propagation. Some piston skirts are further enhanced with a molybdenum disulfide coating, applied through screen printing, to significantly reduce friction, thereby boosting performance and extending the lifespan of the component.\n\n Each Athena piston is the result of advanced technical solutions and the highest quality standards, meeting or exceeding OE production specifications for guaranteed performance and reliability. Engineered in Italy by the Athena R&D department, every piston undergoes rigorous testing on engine dynamometer benches under progressive stress loads, and is subsequently validated on the track under extreme conditions.\n\n This piston kit includes the piston, pin, circlips, and piston rings. All included components are replaceable and interchangeable. The piston rings are produced in Japan with wear-resistant coatings, such as PVD or chromium nitride, to increase durability and lifespan. These rings ensure a perfect fit with the cylinder liner, even at low tangential loads, minimizing friction for higher performance.\n\n **Key Features:**\n\n \n- Forged Piston Type\n \n- Biconical Piston Pin Type\n \n- Piston Bore Diameter: 76.97 mm\n \n- Compression Height: 19.90 mm\n \n- Compression Ratio: 13.7:1\n \n- Displacement: 250 cc\n \n- Number of Segments: 2\n \n- Includes piston, pin, circlips, and piston rings\n \n- High-performance aluminum alloy with high silicon content\n \n- Reduced friction for enhanced performance and durability\n \n- Rigorously tested for performance and reliability\n \n- OE quality or better","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"KX 250","cc":null,"notes":null,"years":"2017–2019"},{"make":"KAWASAKI","model":"KX 250F","cc":null,"notes":null,"years":"2017–2019"}],"collections":[{"name":"Engine","url":"https://www.2brosparts.com/api/agent/collection/GB/engine"},{"name":"Pistons & Kits","url":"https://www.2brosparts.com/api/agent/collection/GB/pistons-kits"}],"links":{"page":"https://www.2brosparts.com/products/piston-kit-b-77mm-kawasaki-kx-250-17-19-athena-s5f07700006b","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/14d1b20d56cc:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/14d1b20d56cc: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."]}}