{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"e2406c0447b7","name":"CYLINDER FULL KIT 98mm 06-15 YAMAHA YZ WR 450 ATHENA P400485100021 480CC BIG BORE (PISTON INCLUDED)","sku":"56-K108.98.KIT","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":3,"price":{"amount":684,"formatted":"£684.00"},"summary":"Athena Big Bore Cylinder Kit Ø 98 mm, 480 cc, P400485100021. Engineered in Italy by Athena’s R&D Department, this cylinder is coated with motor-nicksil, a nickel-silicon coating for smoothness and wear resistance. Athena’s cylinder kits are known for performance, durability, and reliability. The Big Bore Cylinder Kits guarantee an increase in performance along the power curve 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 kit can be installed without engine crankcase modifications. Bore Diameter: 98.00 mm. Compression Ratio: 12.4:1. Displacement: 480 cc. Net Weight: 2.25 Kg. Partner Cross Reference codes: K8562D300-1ZA, WT400485100021. Optional Parts: S4F09800005A Piston Kit ø 97,94, S4F09800005B Piston Kit ø 97,95, P400485160013 Gaskets Kit, S41316027 Rings, S41317004 Piston Pin. Part No. 56-K108.98.KIT.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"Variant Id","value":"252631"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K108_2E98_2EKIT/98dfa99d89310d3f.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K108_2E98_2EKIT/98dfa99d89310d3f.jpg"],"description":"Athena Big Bore Cylinder Kit Ø 98 mm, 480 cc, P400485100021. Engineered in Italy by Athena’s R&D Department, this cylinder is coated with motor-nicksil, a nickel-silicon coating for smoothness and wear resistance. Athena’s cylinder kits are known for performance, durability, and reliability. The Big Bore Cylinder Kits guarantee an increase in performance along the power curve 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 kit can be installed without engine crankcase modifications. Bore Diameter: 98.00 mm. Compression Ratio: 12.4:1. Displacement: 480 cc. Net Weight: 2.25 Kg. Partner Cross Reference codes: K8562D300-1ZA, WT400485100021. Optional Parts: S4F09800005A Piston Kit ø 97,94, S4F09800005B Piston Kit ø 97,95, P400485160013 Gaskets Kit, S41316027 Rings, S41317004 Piston Pin. Part No. 56-K108.98.KIT.","descriptionMarkdown":"### Athena Big Bore Cylinder Kit - 480cc\n\nUpgrade your motorcycle's performance with the Athena Big Bore Cylinder Kit. This kit is meticulously engineered in Italy by Athena's dedicated R&D department, utilizing advanced design and testing tools. The cylinder features a Motor-Nicksil coating, a proprietary nickel-silicon blend developed by Athena for superior smoothness and exceptional wear resistance.\n\nAthena's big bore kits are globally recognized for enhancing performance, durability, and reliability. This kit provides a noticeable increase in power across the engine's RPM range while maintaining the reliability expected from original components.\n\nThe complete kit includes:\n\n \n- A high-quality aluminum cylinder with an increased bore diameter.\n \n- A complete piston assembly, including piston pin and rings.\n \n- All necessary gaskets for installation.\n\nEvery component in this kit is designed to withstand extreme temperatures, pressures, and stresses, having undergone rigorous testing by Athena technicians on both dynamometers and public roads. This cylinder kit can be installed without requiring any modifications to the engine crankcase.\n\n**Technical Specifications:**\n\n \n- Bore Diameter: 98.00 mm\n \n- Compression Ratio: 12.4:1\n \n- Displacement: 480 cc\n \n- Net Weight: 2.25 kg","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"WR 450F","cc":null,"notes":null,"years":"2003–2015"},{"make":"YAMAHA","model":"WRF 450","cc":null,"notes":null,"years":"2007–2015"},{"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 450X","cc":null,"notes":null,"years":"2009–2015"},{"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":"2010–2018"},{"make":"YAMAHA","model":"YFZ R 450","cc":null,"notes":null,"years":"2009–2018"},{"make":"YAMAHA","model":"YFZ R SPECIAL EDITION 450","cc":null,"notes":null,"years":"2010–2013"},{"make":"YAMAHA","model":"YFZ S 450","cc":null,"notes":null,"years":"2004–2011"},{"make":"YAMAHA","model":"YFZ X 450","cc":null,"notes":null,"years":"2009–2021"},{"make":"YAMAHA","model":"YFZ X SPECIAL EDITION 450","cc":null,"notes":null,"years":"2011–2018"},{"make":"YAMAHA","model":"YZ 450F","cc":null,"notes":null,"years":"2003–2009"},{"make":"YAMAHA","model":"YZF 450","cc":null,"notes":null,"years":"2006–2009"}],"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-06-15-yamaha-yz-wr-450-athena-p400485100021-480cc-big-bor","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/e2406c0447b7:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/e2406c0447b7:1"}},"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."]}}