{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"c2d004921b7b","name":"PISTON KIT A 85MM HONDA CRF 250 18-21, ATHENA S4F08500004A 289CC BIG BORE, KIT A","sku":"56-K197.85.PIS.A","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":202.61,"formatted":"£202.61"},"summary":"ATHENA Forged Racing Piston Kit A for Athena Big Bore Cylinder, 85mm Bore Diameter, 289cc Displacement, 13.0:1 Compression Ratio. Includes piston, pin, circlips, and 2 piston rings with wear-resistant coatings. Piston features a special high-performance aluminum alloy with high silicon content and may have a molybdenum disulfide coating on the skirt to reduce friction. Manufactured with cutting-edge CNC machining tools ensuring dimensional tolerances of less than 0.01 mm. Big End Pin Diameter 16x40x9mm, Compression Height 18.92mm, Biconical Piston Pin Type. Intended for competitive use only.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"295779"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K197_2E85_2EPIS_2EA/ea5948e5de73eed0.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K197_2E85_2EPIS_2EA/ea5948e5de73eed0.jpg"],"description":"ATHENA Forged Racing Piston Kit A for Athena Big Bore Cylinder, 85mm Bore Diameter, 289cc Displacement, 13.0:1 Compression Ratio. Includes piston, pin, circlips, and 2 piston rings with wear-resistant coatings. Piston features a special high-performance aluminum alloy with high silicon content and may have a molybdenum disulfide coating on the skirt to reduce friction. Manufactured with cutting-edge CNC machining tools ensuring dimensional tolerances of less than 0.01 mm. Big End Pin Diameter 16x40x9mm, Compression Height 18.92mm, Biconical Piston Pin Type. Intended for competitive use only.","descriptionMarkdown":"### Athena Forged Racing Piston Kit A 85mm 289cc Big Bore\n\nUpgrade your motorcycle's performance with this high-quality Athena Forged Racing Piston Kit. Engineered for superior reliability and power, this kit is designed to deliver exceptional results for demanding riders. Athena utilizes advanced manufacturing techniques and premium materials to ensure each piston meets the highest standards of quality and durability.\n\n**Key Features:**\n\n \n- Forged Construction: Made from a special high-performance aluminum alloy with a high silicon content for enhanced strength and resistance.\n \n- Precision Machining: Produced using cutting-edge CNC machinery, guaranteeing dimensional tolerances of less than 0.01 mm for a perfect fit and optimal performance.\n \n- Optimized Design: Features a smooth profile for regular airflow and perfect flame propagation, contributing to improved combustion efficiency.\n \n- Reduced Friction: Some piston skirts are treated with a molybdenum disulfide coating to further reduce friction, boosting performance and extending durability.\n \n- High-Quality Piston Rings: Rings are manufactured in Japan with wear-resistant coatings (PVD or chromium nitride) for increased durability and longevity. They are designed to adapt perfectly to the cylinder liner.\n \n- Complete Kit: Includes the piston, piston pin, circlips, and piston rings. All components are replaceable and interchangeable.\n \n- Engineered in Italy: Developed by Athena's R&D department and rigorously tested on dynamometer benches and on the track under extreme conditions.\n\n**Technical Specifications:**\n\n \n- Piston Type: Forged\n \n- Bore Diameter: 85.00 mm\n \n- Compression Height: 18.92 mm\n \n- Compression Ratio: 13.0:1\n \n- Displacement: 289 cc\n \n- Number of Segments (Rings): 2\n \n- Piston Pin Type: Biconical\n \n- Big End Pin Diameter: 16x40x9 mm\n\n_Note: Products designed for increased displacement and power intended for competitive use are subject to specific regulations. Please ensure compliance with local road codes._","weightGrams":null,"fitments":[{"make":"HONDA","model":"CRF 250R","cc":null,"notes":null,"years":"2018–2022"},{"make":"HONDA","model":"CRF 250RX","cc":null,"notes":null,"years":"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-a-85mm-honda-crf-250-18-21-athena-s4f08500004a-289cc-big-bore-kit-a","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/c2d004921b7b:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/c2d004921b7b: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."]}}