{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"3a142c8acaa5","name":"CYLINDER FULL KIT +5.60mm BIG BORE 72.00mm YAMAHA 2003 - 2025 YZ 2T 250 ATHENA P400485100042","sku":"56-K156.72.CKA","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":8,"price":{"amount":1140.4,"formatted":"£1,140.40"},"summary":"Athena Big Bore Cylinder Kit for Yamaha YZ 250 2T. Increases displacement to 293cc with a bore diameter of 72.00mm (+5.60mm over stock). Features a high-quality aluminum cylinder with a nickel-silicon coating for durability and wear resistance. Designed for direct installation without modifications to the engine crankcase. Bore diameter is 72.00mm, with a bore gain of +5.6mm. Compression ratio is 15.0:1. Displacement is 293cc. Net weight is 3.50 kg. Includes aluminum cylinder, cylinder head, complete piston (with piston pin and rings), exhaust valve kit, and gasket kit.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"Variant Id","value":"252968"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K156_2E72_2ECKA/54c3e13155b2a1ad.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K156_2E72_2ECKA/54c3e13155b2a1ad.jpg"],"description":"Athena Big Bore Cylinder Kit for Yamaha YZ 250 2T. Increases displacement to 293cc with a bore diameter of 72.00mm (+5.60mm over stock). Features a high-quality aluminum cylinder with a nickel-silicon coating for durability and wear resistance. Designed for direct installation without modifications to the engine crankcase. Bore diameter is 72.00mm, with a bore gain of +5.6mm. Compression ratio is 15.0:1. Displacement is 293cc. Net weight is 3.50 kg. Includes aluminum cylinder, cylinder head, complete piston (with piston pin and rings), exhaust valve kit, and gasket kit.","descriptionMarkdown":"### Athena Big Bore Cylinder Kit for Yamaha YZ 250 2T - 293cc\n\nUpgrade your Yamaha YZ 250 2T with the Athena Big Bore Cylinder Kit, engineered in Italy for enhanced performance. This comprehensive kit increases your engine's displacement to 293cc, featuring a 72.00mm bore diameter which is a +5.60mm increase over stock.\n\nThe high-quality aluminum cylinder is treated with a durable nickel-silicon coating, providing exceptional wear resistance for longevity. Designed for a straightforward installation, this kit does not require any modifications to your engine's crankcase.\n\n#### Key Features:\n\n\t\n- Increased Displacement: Boosts your engine to 293cc for more power.\n\t\n- Oversized Bore: Features a 72.00mm bore diameter (+5.60mm over stock).\n\t\n- High Compression: Achieves a 15.0:1 compression ratio.\n\t\n- Durable Coating: Nickel-silicon coated cylinder for superior wear resistance.\n\t\n- Complete Kit: Includes all necessary components for installation.\n\t\n- Direct Fit: No modifications needed for the engine crankcase.\n\n#### Specifications:\n\n\t\n- Bore Diameter: 72.00mm\n\t\n- Bore Gain: +5.6mm\n\t\n- Compression Ratio: 15.0:1\n\t\n- Displacement: 293cc\n\t\n- Net Weight: 3.50 kg\n\n#### Included Components:\n\n\t\n- Aluminum Cylinder\n\t\n- Cylinder Head\n\t\n- Complete Piston (with pin and rings)\n\t\n- Exhaust Valve Kit\n\t\n- Gasket Kit","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":[{"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-560mm-big-bore-7200mm-yamaha-2003-2025-yz-2t-250-athena-p40048","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/3a142c8acaa5:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/3a142c8acaa5:1"}},"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."]}}