{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"35a9d481621a","name":"YAMAHA YZF 250 2008-2013 GRADE A 76.95mm STANDARD COMPRESSION 13.5:1","sku":"V.3391A","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":259.12,"formatted":"£259.12"},"summary":"Vertex Four-stroke Piston 3391A. Standard compression 13.5:1. Diameter 76.95mm. Grade A. Forged from 2618 aluminum alloy. Features a Molybdenum Disulphide MOS2 coating on the piston skirt. Unique piston profiles and compression ratios offered in A B C and D sizes.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yzf-250-2008-2013-grade-a-76.95mm-standard-compression-13.5-1-1796-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yzf-250-2008-2013-grade-a-76.95mm-standard-compression-13.5-1-1796-p.jpg"],"description":"Vertex Four-stroke Piston 3391A. Standard compression 13.5:1. Diameter 76.95mm. Grade A. Forged from 2618 aluminum alloy. Features a Molybdenum Disulphide MOS2 coating on the piston skirt. Unique piston profiles and compression ratios offered in A B C and D sizes.","descriptionMarkdown":"### Vertex High-Performance Four-Stroke Piston\n\nUpgrade your engine's reliability and power output with this premium Vertex four-stroke piston. Engineered for demanding riders who require consistency and durability, this piston is precision-manufactured to meet the high-pressure environments found in modern performance engines.\n\n### Advanced Forged Construction\n\nEvery Vertex piston is forged from high-quality 2618 aluminum alloy. This material selection ensures superior strength and structural integrity, allowing the component to withstand the intense thermal and mechanical stress generated during competitive riding and high-revving engine operation.\n\n### Key Features\n\n- Precision Sizing: Designed as a Grade A component with a 76.95mm diameter, ensuring an exact fit to your cylinder for optimal sealing.\n\n- Standard Compression: Engineered with a 13.5:1 compression ratio to maintain factory-spec power delivery and combustion efficiency.\n\n- MOS2 Skirt Coating: Features a specialized Molybdenum Disulphide coating on the piston skirt to significantly reduce friction, minimize wear, and assist in a smoother break-in process.\n\n- Performance Optimization: Vertex utilizes unique piston profiles that help maximize horsepower while effectively reducing blow-by and oil consumption.\n\nBy choosing Vertex, you are investing in a component that bridges the gap between professional racing technology and everyday reliability. Whether you are performing a routine rebuild or seeking to restore peak engine performance, this piston provides the perfect balance of quality, durability, and output.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/yamaha-yzf-250-2008-2013-grade-a-7695mm-standard-compression-1351","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/35a9d481621a:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/35a9d481621a: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."]}}