{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"8db019da4de6","name":"YAMAHA YZF 450 2003-2009 WRF 450 2003-2015 98mm 490cc BIG BORE 12.5:1","sku":"V.3404","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":323.92,"formatted":"£323.92"},"summary":"Vertex four-stroke pistons are forged from high-quality 2618 aluminum alloy, suited for high-pressure four-stroke engines. Vertex pistons feature a Molybdenum Disulphide MOS2 coating on the piston skirt for easier break-in and reduced wear. Unique piston profiles and compression ratios are offered in A, B, C, and D sizes, varying by 0.004 inches, allowing for a precise fit to the cylinder to maximize power and performance while reducing blow-by and oil consumption. This piston is 98mm and 490cc with a 12.5:1 compression ratio.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yzf-450-2003-2009-wrf-450-2003-2015-98mm-490cc-big-bore-12.5-1-1808-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yzf-450-2003-2009-wrf-450-2003-2015-98mm-490cc-big-bore-12.5-1-1808-p.jpg"],"description":"Vertex four-stroke pistons are forged from high-quality 2618 aluminum alloy, suited for high-pressure four-stroke engines. Vertex pistons feature a Molybdenum Disulphide MOS2 coating on the piston skirt for easier break-in and reduced wear. Unique piston profiles and compression ratios are offered in A, B, C, and D sizes, varying by 0.004 inches, allowing for a precise fit to the cylinder to maximize power and performance while reducing blow-by and oil consumption. This piston is 98mm and 490cc with a 12.5:1 compression ratio.","descriptionMarkdown":"### Vertex Big Bore 98mm 490cc Piston Kit\n\nUpgrade your engine performance with the Vertex Big Bore Piston Kit. Designed for riders looking to increase displacement and maximize power, this 98mm piston kit transforms your engine into a 490cc powerhouse. Engineered for durability and high-performance output, Vertex is a trusted leader in four-stroke engine components.\n\nEach piston is forged from high-quality 2618 aluminum alloy, providing the structural integrity needed to withstand the extreme pressures and heat generated by modern high-performance engines. By increasing the compression ratio to 12.5:1, this kit significantly improves combustion efficiency and overall throttle response.\n\n### Key Features\n\n \n- Increased Displacement: 98mm big bore configuration boosts your engine to 490cc.\n \n- High-Compression Design: Features a 12.5:1 compression ratio for enhanced power delivery.\n \n- Premium Forged Construction: Manufactured from 2618 aluminum alloy for maximum strength and reduced weight.\n \n- MOS2 Skirt Coating: Every piston features a Molybdenum Disulphide coating to assist in the break-in process, minimize friction, and reduce cylinder wall wear.\n \n- Precision Engineering: Designed to offer optimal piston profiles that reduce blow-by and minimize oil consumption.\n\nWhether you are rebuilding for racing or looking for a competitive edge on the track, the Vertex Big Bore Piston Kit delivers the reliability and performance gains required for serious engine builds.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/yamaha-yzf-450-2003-2009-wrf-450-2003-2015-98mm-490cc-big-bore-1251","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/8db019da4de6:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/8db019da4de6:1"}},"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."]}}