{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"f26f329c027b","name":"CYLINDER FULL KIT +5.60mm BIG BORE 72.00mm NEW VERSION YAMAHA 2003 - 2025 YZ 2T 250 ATHENA P400485100104","sku":"56-K156.72.CKA_V2","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":1453.1,"formatted":"£1,453.10"},"summary":"Complete big bore cylinder kit featuring a newly engineered cylinder, piston, head, and associated components. This updated version incorporates revised internal geometries and improved component design to deliver increased engine output, consistent combustion behaviour, and dependable operation across varying engine speeds. Kit includes cylinder, piston, head, and gasket set. Redesigned cylinder with revised port timing for improved gas flow. Direct replacement kit for standard engine configuration. Bore size: 72.00 mm. Bore increase: +5.60 mm. Application: 2-stroke engine. Manufacturer part number: P400485100104.","attributes":[],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K156_2E72_2ECKA_5FV2/9841b57383173ec1.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K156_2E72_2ECKA_5FV2/9841b57383173ec1.jpg"],"description":"Complete big bore cylinder kit featuring a newly engineered cylinder, piston, head, and associated components. This updated version incorporates revised internal geometries and improved component design to deliver increased engine output, consistent combustion behaviour, and dependable operation across varying engine speeds. Kit includes cylinder, piston, head, and gasket set. Redesigned cylinder with revised port timing for improved gas flow. Direct replacement kit for standard engine configuration. Bore size: 72.00 mm. Bore increase: +5.60 mm. Application: 2-stroke engine. Manufacturer part number: P400485100104.","descriptionMarkdown":"### Athena Big Bore Cylinder Kit for Yamaha YZ 250 2-Stroke\n\nUpgrade your Yamaha YZ 250 2-stroke with this complete Big Bore Cylinder Kit from Athena. This new version features a redesigned cylinder, piston, head, and associated components for enhanced engine performance, consistent combustion, and reliable operation. The revised internal geometries and improved component design contribute to increased power output across the engine's speed range.\n\n#### Key Features:\n\n \n- Complete kit includes cylinder, piston, head, and gasket set.\n \n- Redesigned cylinder with revised port timing for optimized gas flow.\n \n- Engineered for a direct replacement of the standard engine configuration.\n \n- Specifically designed for 2-stroke engines.\n\n#### Specifications:\n\n \n- Bore Size: 72.00 mm\n \n- Bore Increase: +5.60 mm\n \n- Manufacturer Part Number: P400485100104","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"YZ 250","cc":null,"notes":null,"years":"2003–2021"},{"make":"YAMAHA","model":"YZ 2T 250","cc":null,"notes":null,"years":"2003–2019"}],"collections":[],"links":{"page":"https://www.2brosparts.com/products/cylinder-full-kit-560mm-big-bore-7200mm-new-version-yamaha-2003-2025-yz-2t-250-a","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/f26f329c027b:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/f26f329c027b: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."]}}