{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"5ae248377b6a","name":"CYLINDER FULL KIT 81MM YAMAHA WR/YZ 250 14-18, ATHENA P400485100050 276CC BIG BORE, (Piston included)","sku":"56-K170.81.KIT","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":653.87,"formatted":"£653.87"},"summary":"ATHENA Big Bore Cylinder Kit Ø 81 mm, 276 cc - P400485100050. Athena has invested in cylinder aftermarket replacement parts for over ten years, with cylinders engineered in Italy by Athena’s R&D Department. Cylinders are coated with motor-nicksil, a nickel-silicon coating developed by Athena for smoothness and wear resistance. Athena's cylinder kits are recognized worldwide for performance, durability, and reliability. Big Bore Cylinder Kits guarantee an increase in performance while maintaining original component reliability. The kit includes an aluminum cylinder with increased bore, a complete piston with pin and rings, and all necessary gaskets. Components are developed to withstand high temperatures, pressures, and stresses, validated by Athena technicians through bench and road tests. This cylinder kit can be installed without modifying the engine crankcase. Bore Diameter: 81.00 mm, Compression Ratio: 13.6:1, Displacement: 276 cc, Net Weight: 1.38 Kg.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"General Size","value":"81mm"},{"label":"Variant Id","value":"253032"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K170_2E81_2EKIT/47818ee2c46b4a5b.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K170_2E81_2EKIT/47818ee2c46b4a5b.jpg"],"description":"ATHENA Big Bore Cylinder Kit Ø 81 mm, 276 cc - P400485100050. Athena has invested in cylinder aftermarket replacement parts for over ten years, with cylinders engineered in Italy by Athena’s R&D Department. Cylinders are coated with motor-nicksil, a nickel-silicon coating developed by Athena for smoothness and wear resistance. Athena's cylinder kits are recognized worldwide for performance, durability, and reliability. Big Bore Cylinder Kits guarantee an increase in performance while maintaining original component reliability. The kit includes an aluminum cylinder with increased bore, a complete piston with pin and rings, and all necessary gaskets. Components are developed to withstand high temperatures, pressures, and stresses, validated by Athena technicians through bench and road tests. This cylinder kit can be installed without modifying the engine crankcase. Bore Diameter: 81.00 mm, Compression Ratio: 13.6:1, Displacement: 276 cc, Net Weight: 1.38 Kg.","descriptionMarkdown":"### Athena Big Bore Cylinder Kit - 276cc\n\nThis Athena Big Bore Cylinder Kit is engineered to enhance the performance of your motorcycle. Designed and tested in Italy, this kit features a precision-crafted aluminum cylinder with an increased bore diameter of 81mm, boosting the displacement to 276cc.\n\nThe cylinder is coated with Athena's proprietary Motor-Nicksil, a nickel-silicon coating that provides superior smoothness and exceptional wear resistance for increased longevity.\n\n**Key Features:**\n\n \n- Increased Displacement: Boosts engine capacity to 276cc for noticeable performance gains.\n \n- Durable Coating: Features Motor-Nicksil coating for enhanced durability and wear resistance.\n \n- Complete Kit: Includes a high-quality aluminum cylinder, a complete piston with pin and rings, and all necessary gaskets for a comprehensive upgrade.\n \n- Reliability: Engineered to maintain the reliability of original components while improving performance.\n \n- Engineered in Italy: Designed with extensive R&D and advanced tools.\n \n- No Crankcase Modifications Required: Designed for direct installation without altering the engine crankcase.\n \n- High-Quality Materials: Components are built to withstand extreme temperatures, pressures, and stresses, validated through rigorous testing.\n\n**Technical Specifications:**\n\n \n- Bore Diameter: 81.00 mm\n \n- Compression Ratio: 13.6:1\n \n- Displacement: 276 cc\n \n- Weight: 1.38 Kg","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"WR 250F","cc":null,"notes":null,"years":"2015–2018"},{"make":"YAMAHA","model":"WR R 250","cc":null,"notes":null,"years":"2015–2016"},{"make":"YAMAHA","model":"WRF 250","cc":null,"notes":null,"years":"2015–2016"},{"make":"YAMAHA","model":"YZ 250F","cc":null,"notes":null,"years":"2014–2018"},{"make":"YAMAHA","model":"YZ 250FX","cc":null,"notes":null,"years":"2015–2017"},{"make":"YAMAHA","model":"YZF 250","cc":null,"notes":null,"years":"2014–2015"}],"collections":[{"name":"Engine","url":"https://www.2brosparts.com/api/agent/collection/GB/engine"},{"name":"Cylinder Kits","url":"https://www.2brosparts.com/api/agent/collection/GB/cylinder-kits"}],"links":{"page":"https://www.2brosparts.com/products/cylinder-full-kit-81mm-yamaha-wryz-250-14-18-athena-p400485100050-276cc-big-bore","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/5ae248377b6a:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/5ae248377b6a: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."]}}