{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"f72bbc72ed63","name":"CYLINDER FULL KIT 102MM YAMAHA YZ 450 18-20, ATHENA P400485100068 497CC BIG BORE, (Piston included)","sku":"56-K198.102_BB.ATH","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":684,"formatted":"£684.00"},"summary":"ATHENA Big Bore Cylinder Kit Ø 102 mm, 497 cc P400485100068 includes a complete piston. Athena has invested in aftermarket cylinder replacement parts for over ten years, focusing on production and performance. Cylinders are engineered in Italy by Athena’s R&D Department. They feature a nickel-silicon coating for smoothness and wear resistance. Athena's cylinder kits are known worldwide for performance, durability, and reliability. Big Bore Cylinder Kits guarantee an observable increase in performance along the power curve while maintaining original component reliability. The kit includes a high-quality aluminum cylinder with an 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 cylinder kit installs without engine crankcase modifications. Technical features include a bore diameter of 102.00 mm, a bore gain of +5 mm, a compression ratio of 12.3:1, and a displacement of 497 cc.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"Variant Id","value":"291336"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K198_2E102_5FBB_2EATH/7a95bd976a304fd8.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K198_2E102_5FBB_2EATH/7a95bd976a304fd8.jpg"],"description":"ATHENA Big Bore Cylinder Kit Ø 102 mm, 497 cc P400485100068 includes a complete piston. Athena has invested in aftermarket cylinder replacement parts for over ten years, focusing on production and performance. Cylinders are engineered in Italy by Athena’s R&D Department. They feature a nickel-silicon coating for smoothness and wear resistance. Athena's cylinder kits are known worldwide for performance, durability, and reliability. Big Bore Cylinder Kits guarantee an observable increase in performance along the power curve while maintaining original component reliability. The kit includes a high-quality aluminum cylinder with an 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 cylinder kit installs without engine crankcase modifications. Technical features include a bore diameter of 102.00 mm, a bore gain of +5 mm, a compression ratio of 12.3:1, and a displacement of 497 cc.","descriptionMarkdown":"### Athena Big Bore Cylinder Kit - 497cc\n\nUpgrade your motorcycle's performance with the Athena Big Bore Cylinder Kit. This comprehensive kit is engineered to enhance power and torque while maintaining the reliability of your original components. Athena's commitment to quality and innovation is evident in every part of this kit, designed and tested in Italy.\n\n#### Key Features:\n\n \n- Increased Displacement: Boosts your engine to 497cc for significant performance gains.\n \n- Durable Construction: Features a high-quality aluminum cylinder coated with Athena's proprietary Motor-Nicksil, offering exceptional smoothness and wear resistance.\n \n- Complete Kit: Includes the enlarged bore cylinder, a complete piston assembly (piston, pin, rings), and all necessary gaskets for a straightforward installation.\n \n- Enhanced Performance: Experience a noticeable increase in power throughout the RPM range.\n \n- Reliable Engineering: Designed to withstand high temperatures, pressures, and stresses, validated through rigorous bench and road testing.\n \n- No Crankcase Modification: This kit can be installed without altering the engine crankcase.\n\n#### Technical Specifications:\n\n \n- Bore Diameter: 102.00 mm\n \n- Bore Gain: + 5 mm\n \n- Compression Ratio: 12.3:1\n \n- Displacement: 497 cc\n\n**Important Note:** All Athena products must be used in compliance with applicable national regulations. Athena assumes no responsibility for improper use.","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"YZ 450F","cc":null,"notes":null,"years":"2018–2019"},{"make":"YAMAHA","model":"YZ 450FX","cc":null,"notes":null,"years":"2019–2020"},{"make":"YAMAHA","model":"YZF 450","cc":null,"notes":null,"years":"2018–2019"}],"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-102mm-yamaha-yz-450-18-20-athena-p400485100068-497cc-big-bore-","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/f72bbc72ed63:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/f72bbc72ed63:1"}},"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."]}}