{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"0960e964191d","name":"CYLINDER FULL KIT 98MM YAMAHA YFZ 450 09-25, ATHENA P400485100047 478CC BIG BORE, (Piston included)","sku":"56-K172.98.CKA","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":684,"formatted":"£684.00"},"summary":"Big bore cylinder kit increases engine capacity to 478 cc. Supplied as a complete replacement assembly, including an aluminium cylinder with a nickel-silicon wear-resistant coating, a piston assembly, and all required gaskets. Designed for installation without engine crankcase modifications. Features a wear-resistant nickel-silicon cylinder coating for reduced friction and improved durability. Includes cylinder, piston, piston pin, piston rings, and full gasket set. Bore diameter 98.00 mm. Displacement 478.00 cc. Compression ratio 12.5:1. Net weight 1.17 kg. Cylinder material aluminium. Cylinder coating nickel-silicon (Motor-Nicksil).","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"Variant Id","value":"253041"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K172_2E98_2ECKA/6c498fe5c4705fc2.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K172_2E98_2ECKA/6c498fe5c4705fc2.jpg"],"description":"Big bore cylinder kit increases engine capacity to 478 cc. Supplied as a complete replacement assembly, including an aluminium cylinder with a nickel-silicon wear-resistant coating, a piston assembly, and all required gaskets. Designed for installation without engine crankcase modifications. Features a wear-resistant nickel-silicon cylinder coating for reduced friction and improved durability. Includes cylinder, piston, piston pin, piston rings, and full gasket set. Bore diameter 98.00 mm. Displacement 478.00 cc. Compression ratio 12.5:1. Net weight 1.17 kg. Cylinder material aluminium. Cylinder coating nickel-silicon (Motor-Nicksil).","descriptionMarkdown":"### Athena Big Bore Cylinder Kit 478cc for Yamaha YFZ 450\n\n Upgrade your Yamaha YFZ 450 with this Athena Big Bore Cylinder Kit, designed to increase engine displacement to a powerful 478cc. This comprehensive kit provides a complete top-end replacement, ensuring optimal performance and durability.\n\n### Key Features:\n\n \n- Increased Displacement: Boosts engine capacity to 478cc for enhanced power and torque.\n \n- Complete Kit: Supplied as a full replacement assembly, including the cylinder, piston, piston pin, piston rings, and a complete gasket set.\n \n- Durable Construction: Features an aluminum cylinder with a wear-resistant nickel-silicon coating (Motor-Nicksil) for reduced friction and extended lifespan.\n \n- Easy Installation: Engineered for direct installation without requiring any modifications to the engine crankcase.\n \n- High-Performance Design: Specifically developed and rigorously tested on both dynamometer benches and real-world road conditions to ensure reliability under high-temperature and high-load scenarios.\n\n### Specifications:\n\n \n- Bore Diameter: 98.00 mm\n \n- Total Displacement: 478.00 cc\n \n- Compression Ratio: 12.5:1\n \n- Cylinder Material: Aluminum\n \n- Cylinder Coating: Nickel-Silicon (Motor-Nicksil)\n \n- Net Weight: 1.17 kg","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-full-kit-98mm-yamaha-yfz-450-09-25-athena-p400485100047-478cc-big-bore-","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/0960e964191d:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/0960e964191d: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."]}}