{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"0c5655ced037","name":"PISTON KIT B 77MM YAMAHA WR/YZ 250 16-22, ATHENA S5F07700009B","sku":"56-W4966.B.ATH","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":4,"price":{"amount":166.55,"formatted":"£166.55"},"summary":"ATHENA Forged Piston Kit B 77mm. Bore Diameter 76.96 mm. Compression Height 20.20 mm. Compression Ratio 13.5:1. Displacement 250cc. Piston Type Forged. Number Of Segments 2. Piston Pin Type Standard. Big End Pin Diameter 16x9.5x38 mm. Net Weight 0.18 Kg. Piston manufactured with a special high-performance aluminum alloy with high silicon content. Features include cutting-edge CNC machining for dimensional tolerances under 0.01 mm, molybdenum disulfide coating on some piston skirts to reduce friction, and piston rings produced in Japan with wear-resistant coatings (PVD or chromium nitride). Kit includes piston, pin, circlips, and piston rings. All components are replaceable and interchangeable. Products intended for competitive use are not subject to guarantee unless faulty.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77mm"},{"label":"Variant Id","value":"289768"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4966_2EB_2EATH/7be111b6582b75ad.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4966_2EB_2EATH/7be111b6582b75ad.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4966_2EB_2EATH/0242a108eae74434.jpg"],"description":"ATHENA Forged Piston Kit B 77mm. Bore Diameter 76.96 mm. Compression Height 20.20 mm. Compression Ratio 13.5:1. Displacement 250cc. Piston Type Forged. Number Of Segments 2. Piston Pin Type Standard. Big End Pin Diameter 16x9.5x38 mm. Net Weight 0.18 Kg. Piston manufactured with a special high-performance aluminum alloy with high silicon content. Features include cutting-edge CNC machining for dimensional tolerances under 0.01 mm, molybdenum disulfide coating on some piston skirts to reduce friction, and piston rings produced in Japan with wear-resistant coatings (PVD or chromium nitride). Kit includes piston, pin, circlips, and piston rings. All components are replaceable and interchangeable. Products intended for competitive use are not subject to guarantee unless faulty.","descriptionMarkdown":"### Athena Forged Piston Kit - High Performance and Reliability\n\nUpgrade your motorcycle's performance and reliability with this Athena Forged Piston Kit. Engineered in Italy, Athena is a leader in producing high-quality motorcycle spare parts with over 40 years of experience. This piston kit is designed for optimal performance in off-road applications.\n\n#### Key Features:\n\n \n- Forged Piston Construction: Made using a cutting-edge reverse extrusion process and advanced CNC machining for exceptional dimensional accuracy (tolerances less than 0.01 mm).\n \n- High-Performance Alloy: Constructed from a special high-silicon aluminum alloy, offering superior resistance and performance while maintaining OE-level reliability.\n \n- Optimized Profile: Features a smooth profile for regular flow and perfect flame propagation, enhancing combustion efficiency.\n \n- Reduced Friction: Some piston skirts are treated with a molybdenum disulfide coating, applied via screen printing, to further reduce friction, boost performance, and increase durability.\n \n- High-Quality Piston Rings: Rings are produced in Japan with wear-resistant coatings (PVD or chromium nitride) for increased durability and longevity. They ensure excellent cylinder liner adaptation even at low tangential load.\n \n- Complete Kit: Includes piston, pin, circlips, and piston rings. All components are replaceable and interchangeable.\n \n- Engineered for Performance: Rigorously tested on dynamometer benches and on the track under extreme conditions to validate performance and reliability.\n\n#### Technical Specifications:\n\n \n- Piston Type: Forged\n \n- Bore Diameter: 76.96 mm\n \n- Compression Height: 20.20 mm\n \n- Compression Ratio: 13.5:1\n \n- Displacement: 250 cc\n \n- Number Of Segments: 2\n \n- Piston Pin Type: Standard\n \n- Big End Pin Diameter: 16x9.5x38 mm\n \n- Net Weight: 0.18 Kg","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"WR 250F","cc":null,"notes":null,"years":"2018–2019"},{"make":"YAMAHA","model":"WRF 250","cc":null,"notes":null,"years":"2018–2019"},{"make":"YAMAHA","model":"YZ 250F","cc":null,"notes":null,"years":"2016–2018"},{"make":"YAMAHA","model":"YZ 250FX","cc":null,"notes":null,"years":"2017–2019"},{"make":"YAMAHA","model":"YZF 250","cc":null,"notes":null,"years":"2016–2018"},{"make":"YAMAHA","model":"YZF X 250","cc":null,"notes":null,"years":"2017–2018"}],"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-yamaha-wryz-250-16-22-athena-s5f07700009b","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/0c5655ced037:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/0c5655ced037:1"}},"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."]}}