{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"c3f70d526b0e","name":"CYLINDER KIT BIG BORE 2009-2018 YAMAHA YFZ450R WORKS CYLINDER 21003-K02","sku":"56-K172.98.CKW","brand":"Cylinder Works","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":658.75,"formatted":"£658.75"},"summary":"Cylinder Works +3mm Big Bore Complete Cylinder Kit increases displacement to 478cc. This direct bolt-on kit requires no re-plating and includes all necessary components for installation, featuring a matched Vertex piston for durability and performance. Features include direct bolt-on installation with no additional machining required, Nickel Silicon Carbide plating for extended lifespan, and honing to exact size for easy piston installation. Big bore cylinders do not require additional machine work unless specified. Includes cylinder, piston assembly, and top-end gasket set. Bore is +3mm and displacement is 478cc. Uses Vertex Piston #23403. Cross-references YAMAHA OEM Part Number 2S2-11311-10-00.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"Variant Id","value":"283296"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K172_2E98_2ECKW/791edbf97c7ac16c.png","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K172_2E98_2ECKW/791edbf97c7ac16c.png"],"description":"Cylinder Works +3mm Big Bore Complete Cylinder Kit increases displacement to 478cc. This direct bolt-on kit requires no re-plating and includes all necessary components for installation, featuring a matched Vertex piston for durability and performance. Features include direct bolt-on installation with no additional machining required, Nickel Silicon Carbide plating for extended lifespan, and honing to exact size for easy piston installation. Big bore cylinders do not require additional machine work unless specified. Includes cylinder, piston assembly, and top-end gasket set. Bore is +3mm and displacement is 478cc. Uses Vertex Piston #23403. Cross-references YAMAHA OEM Part Number 2S2-11311-10-00.","descriptionMarkdown":"### Cylinder Works Big Bore Cylinder Kit for Yamaha YFZ450R/X\n\nUpgrade your Yamaha YFZ450R or YFZ450X with this complete Big Bore Cylinder Kit from Cylinder Works. This kit increases the engine displacement to 478cc for enhanced power and performance. Designed as a direct bolt-on, it requires no re-plating or additional machining, simplifying the installation process.\n\n**Key Features:**\n\n\t\n- Increases displacement to 478cc for greater power output.\n\t\n- Direct bolt-on installation requires no additional machining.\n\t\n- Nickel Silicon Carbide plated cylinder for superior durability and extended lifespan.\n\t\n- Honed to precise dimensions for effortless piston installation.\n\t\n- Includes a matched Vertex piston for optimal performance and reliability.\n\t\n- No re-plating necessary, saving time and effort.\n\n**Included Components:**\n\n\t\n- Cylinder\n\t\n- Piston assembly (Vertex Piston #23403)\n\t\n- Top-end gasket set\n\n**Specifications:**\n\n\t\n- Bore Size: +3mm\n\t\n- Total Displacement: 478cc","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"YFZ 450 Bill Balance Edition","cc":null,"notes":null,"years":"2010"},{"make":"YAMAHA","model":"YFZ 450R","cc":null,"notes":null,"years":"2009–2017"},{"make":"YAMAHA","model":"YFZ 450R Special Edition","cc":null,"notes":null,"years":"2010–2013"},{"make":"YAMAHA","model":"YFZ 450S","cc":null,"notes":null,"years":"2004–2011"},{"make":"YAMAHA","model":"YFZ 450X","cc":null,"notes":null,"years":"2010–2011"},{"make":"YAMAHA","model":"YFZ 450X Special Edition","cc":null,"notes":null,"years":"2011"},{"make":"YAMAHA","model":"YFZ BILL BALANCE EDITION 450","cc":null,"notes":null,"years":"2010"},{"make":"YAMAHA","model":"YFZ R 450","cc":null,"notes":null,"years":"2009–2017"},{"make":"YAMAHA","model":"YFZ S 450","cc":null,"notes":null,"years":"2004–2013"},{"make":"YAMAHA","model":"YFZ X 450","cc":null,"notes":null,"years":"2010–2021"}],"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-kit-big-bore-2009-2018-yamaha-yfz450r-works-cylinder-21003-k02","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/c3f70d526b0e:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/c3f70d526b0e: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."]}}