{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"1b56518ddcdc","name":"YAMAHA YZ 250 1999-2022 GRADE B 66.35mm SINGLE RING FORGED PRO RACE PISTON","sku":"V.2645B","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":9,"price":{"amount":234.82,"formatted":"£234.82"},"summary":"Vertex pistons are manufactured using low-expansion silicon-charged aluminum alloys, either gravity cast or forged, and refined with advanced heat treatment. Machining is performed using state-of-the-art CNC machines and diamond tools to achieve specific surface finishes. Each piston undergoes rigorous quality control. Vertex pistons feature a Molybdenum Bisulphite black coating for break-in and friction reduction, with a newer Phosphate Coating for increased hardness, porosity, and extended durability. This piston has a bore of 66.35mm and a single ring.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-250-1999-2020-grade-d-66.37mm-single-ring-race-piston-1602-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-250-1999-2020-grade-d-66.37mm-single-ring-race-piston-1602-p.jpg"],"description":"Vertex pistons are manufactured using low-expansion silicon-charged aluminum alloys, either gravity cast or forged, and refined with advanced heat treatment. Machining is performed using state-of-the-art CNC machines and diamond tools to achieve specific surface finishes. Each piston undergoes rigorous quality control. Vertex pistons feature a Molybdenum Bisulphite black coating for break-in and friction reduction, with a newer Phosphate Coating for increased hardness, porosity, and extended durability. This piston has a bore of 66.35mm and a single ring.","descriptionMarkdown":"### Vertex Pro Race Forged Piston 66.35mm\n\nUpgrade your engine performance with the Vertex Pro Race Forged Piston. Engineered for demanding environments, this piston is crafted using advanced Low-Ex silicon-charged aluminium alloys, chosen for their superior thermal stability and durability. Through a sophisticated hydraulic forging process and precision heat treatment, Vertex ensures a refined material structure that stands up to the rigours of competitive riding.\n\nEvery piston is machined using high-precision CNC technology and diamond-tipped tooling to achieve exacting tolerances and surface finishes. Designed with a single ring configuration, this component is built to deliver optimal compression and power delivery.\n\n### Key Features\n\n \n- Advanced Forged Construction: Utilises exotic Low-Ex aluminium alloys for maximum strength and minimal thermal expansion.\n \n- Precision Machining: CNC machined with diamond tools for perfect geometry and consistent surface quality.\n \n- Dual-Layer Coating Technology: Features a Molybdenum Bisulphite coating to reduce friction during break-in, backed by a high-durability Phosphate coating for superior adhesion and extended service life.\n \n- Rigorous Quality Control: Each piston undergoes strict manual and automatic inspection to meet the highest standards of reliability.\n \n- Optimised Design: Engineered specifically for high-performance applications where engine consistency is critical.\n\nWhether you are performing a full engine rebuild or preparing for a race season, this Vertex forged piston offers the professional-grade performance and longevity required for your machine.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/yamaha-yz-250-1999-2022-grade-b-6635mm-single-ring-forged-pro-race-piston","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/1b56518ddcdc:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/1b56518ddcdc: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."]}}