{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"86d07a080e5d","name":"PISTON KIT 53MM YAMAHA YZ 85 02-21, ATHENA S5F05300001A 105CC BIG BORE","sku":"56-K154.53_PIA","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":false,"stock":0,"price":{"amount":135.53,"formatted":"£135.53"},"summary":"ATHENA Forged Race Piston &Oslash; 52.95 mm for Athena Big Bore Cylinder. This piston is made from a special high-performance aluminum alloy with a high silicon content, ensuring reliability and durability. It features a perfectly smooth profile for regular flow and perfect flame propagation. Some pistons have a molybdenum disulfide coating on the skirts to reduce friction. Engineered in Italy and tested on engine dynamometer benches and on track. This piston kit includes the piston, pin, circlips, and piston rings. Rings are produced in Japan with wear-resistant coatings. Technical features include: Big End Pin Diameter 14x10x41 mm, Bore Diameter 52.95 mm, Compression Ratio STD, Displacement 85 cc, Net Weight 0.13 Kg, Number Of Segments 1, Piston Head Type Flat, Piston Pin Type Standard, Piston Type Forged. Partner Cross Reference codes: S5F05300001A, S5F05300001B, S5F05300001C, S41316439, S41317085.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"53mm"},{"label":"Variant Id","value":"252957"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K154_2E53_5FPIA/d546131e77d7014e.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K154_2E53_5FPIA/d546131e77d7014e.jpg"],"description":"ATHENA Forged Race Piston &Oslash; 52.95 mm for Athena Big Bore Cylinder. This piston is made from a special high-performance aluminum alloy with a high silicon content, ensuring reliability and durability. It features a perfectly smooth profile for regular flow and perfect flame propagation. Some pistons have a molybdenum disulfide coating on the skirts to reduce friction. Engineered in Italy and tested on engine dynamometer benches and on track. This piston kit includes the piston, pin, circlips, and piston rings. Rings are produced in Japan with wear-resistant coatings. Technical features include: Big End Pin Diameter 14x10x41 mm, Bore Diameter 52.95 mm, Compression Ratio STD, Displacement 85 cc, Net Weight 0.13 Kg, Number Of Segments 1, Piston Head Type Flat, Piston Pin Type Standard, Piston Type Forged. Partner Cross Reference codes: S5F05300001A, S5F05300001B, S5F05300001C, S41316439, S41317085.","descriptionMarkdown":"### Athena Forged Piston Kit 53mm for Big Bore Cylinder\n\n This Athena Piston Kit is engineered for performance and reliability, featuring a forged piston crafted from a special high-performance aluminum alloy with a high silicon content. Manufactured using advanced CNC machining for precise tolerances, this piston ensures superior resistance and excellent performance, comparable to or exceeding Original Equipment (OE) standards.\n\n#### Key Features:\n\n \n- Forged Piston: Constructed from a high-performance aluminum alloy with high silicon content for enhanced durability and performance.\n \n- Precision Machining: Utilizes cutting-edge CNC machining tools to achieve dimensional tolerances of less than 0.01 mm.\n \n- Optimized Profile: Features a smooth piston profile for regular flow and perfect flame propagation.\n \n- Reduced Friction: Some piston skirts are treated with a molybdenum disulfide coating applied by screen printing to further reduce friction, enhancing performance and durability.\n \n- High-Quality Rings: Includes piston rings produced in Japan with wear-resistant coatings (PVD or chromium nitride) for increased retention and durability, designed to adapt perfectly to the cylinder liner even at low tangential load.\n \n- Complete Kit: This kit contains the 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 tested on engine dynamometer benches and on track for validation under extreme conditions.\n \n- Designed for Big Bore Cylinders: Specifically designed for Athena Big Bore Cylinders.\n\n#### Technical Specifications:\n\n \n- Piston Diameter: 52.95 mm\n \n- Big End Pin Diameter: 14x10x41 mm\n \n- Number Of Segments: 1\n \n- Piston Head Type: Flat\n \n- Piston Pin Type: Standard\n \n- Piston Type: Forged\n \n- Net Weight: 0.13 Kg","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"YZ 85","cc":null,"notes":null,"years":"2002–2019"}],"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-53mm-yamaha-yz-85-02-21-athena-s5f05300001a-105cc-big-bore","buyOneNow":null,"basketWithThis":null}},"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."]}}