{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"edbd3759000c","name":"PISTON KIT B 77MM KAWASAKI KX 250 15-16, ATHENA S5F07700002B","sku":"56-W331.B.ATH","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":166.55,"formatted":"£166.55"},"summary":"ATHENA Forged Piston Ø 76.97 mm. This piston kit includes the piston, pin, circlips, and piston rings. The piston is made of a special high-performance aluminum alloy with high silicon content. Some piston skirts have a molybdenum disulfide coating to reduce friction. The piston rings are produced in Japan with wear-resistant coatings. Technical features: Big End Pin Diameter (mm) 16x9x41.1, Bore Diameter (mm) 76.97, Compression Height (mm) 19.90, Compression Ratio 13.8:1, Displacement (cc) 250, Net Weight (Kg) 0.18, Number Of Segments 2, Piston Pin Type Biconical, Piston Type Forged. Part No. 56-W331.B.ATH.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77mm"},{"label":"Variant Id","value":"289760"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W331_2EB_2EATH/49a0dcab56d48b77.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W331_2EB_2EATH/49a0dcab56d48b77.jpg"],"description":"ATHENA Forged Piston Ø 76.97 mm. This piston kit includes the piston, pin, circlips, and piston rings. The piston is made of a special high-performance aluminum alloy with high silicon content. Some piston skirts have a molybdenum disulfide coating to reduce friction. The piston rings are produced in Japan with wear-resistant coatings. Technical features: Big End Pin Diameter (mm) 16x9x41.1, Bore Diameter (mm) 76.97, Compression Height (mm) 19.90, Compression Ratio 13.8:1, Displacement (cc) 250, Net Weight (Kg) 0.18, Number Of Segments 2, Piston Pin Type Biconical, Piston Type Forged. Part No. 56-W331.B.ATH.","descriptionMarkdown":"### Athena Forged Piston Kit B 77mm\n\nUpgrade your motorcycle's performance with this high-quality Athena forged piston kit. Engineered in Italy by Athena's R&D department, this piston is designed to deliver exceptional reliability and enhanced performance for off-road riding.\n\nCrafted from a special high-performance aluminum alloy with a high silicon content, this piston offers superior strength and durability. Advanced CNC machining ensures dimensional tolerances of less than 0.01 mm for a perfect fit. The smooth piston profile promotes optimal air flow and combustion for increased power.\n\nSome piston skirts feature a molybdenum disulfide coating, applied by screen printing, which further reduces friction for improved performance and extended lifespan. Athena pistons are rigorously tested on engine dynamometers and on the track to ensure they meet the highest quality standards and can withstand extreme conditions.\n\nThis piston kit includes the piston, piston pin, circlips, and piston rings. The piston rings are produced in Japan with wear-resistant coatings (PVD or chromium nitride) to increase durability and longevity. They are designed to adapt perfectly to the cylinder liner, even at low tangential load, minimizing friction and maximizing performance.\n\n**Key Features:**\n\n \n- Piston Type: Forged\n \n- Bore Diameter: 76.97 mm\n \n- Compression Height: 19.90 mm\n \n- Compression Ratio: 13.8:1\n \n- Number Of Segments: 2\n \n- Piston Pin Type: Biconical\n \n- Includes: Piston, pin, circlips, and piston rings\n \n- Material: High-performance aluminum alloy with high silicon content\n \n- Coating: Molybdenum disulfide coating on some piston skirts for reduced friction\n \n- Piston Ring Origin: Japan, with wear-resistant coatings\n \n- Manufacturing: Precision CNC machined for tight tolerances\n \n- Testing: Dynamometer and track tested for performance and reliability\n\n**Note:** Products intended for competitive use or high-performance applications may not be covered by standard warranty unless a clear faultiness is present. Products designed for increased displacement and power beyond legal road limits are intended exclusively for competitive use.","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"KX 250F","cc":null,"notes":null,"years":"2015–2016"}],"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-250-15-16-athena-s5f07700002b","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/edbd3759000c:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/edbd3759000c: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."]}}