{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"d31dbd21be4d","name":"YAMAHA YZ 250 1990-1995 GRADE A 67.94mm TWIN RING PISTON","sku":"V.2154A","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":218.62,"formatted":"£218.62"},"summary":"Vertex pistons are manufactured using Low-Ex aluminum alloys with 12%, 18% or 21% silicon. The pistons are made using gravity cast or hydraulic forging processes and then refined through a high-tech heat treatment. Machining is completed using the latest CNC machines and diamond tools, allowing for specific surface finishes. Each Vertex piston undergoes rigorous manual and automatic quality control. Vertex pistons are coated with a special Molybdenum Bisulphite black coating for break-in and friction reduction. A new Phosphate Coating is also available, increasing hardness and surface porosity for superior adhesion and durability. This piston has a bore size of 67.94mm and is a twin ring piston.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-250-1990-1995-grade-a-67.94mm-twin-ring-piston-5046-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-250-1990-1995-grade-a-67.94mm-twin-ring-piston-5046-p.jpg"],"description":"Vertex pistons are manufactured using Low-Ex aluminum alloys with 12%, 18% or 21% silicon. The pistons are made using gravity cast or hydraulic forging processes and then refined through a high-tech heat treatment. Machining is completed using the latest CNC machines and diamond tools, allowing for specific surface finishes. Each Vertex piston undergoes rigorous manual and automatic quality control. Vertex pistons are coated with a special Molybdenum Bisulphite black coating for break-in and friction reduction. A new Phosphate Coating is also available, increasing hardness and surface porosity for superior adhesion and durability. This piston has a bore size of 67.94mm and is a twin ring piston.","descriptionMarkdown":"### High-Performance Vertex Twin Ring Piston - 67.94mm Grade A\n\nUpgrade your engine with the Vertex Grade A Twin Ring Piston, engineered for precision and reliability. Designed to meet the demanding requirements of high-performance two-stroke engines, this piston provides a perfect balance of strength, durability, and friction reduction to keep your machine running at its peak.\n\nVertex pistons are manufactured using exotic Low-Ex (low expansion) silicon-charged aluminium alloys. Through a combination of gravity casting or hydraulic forging and advanced heat treatment processes, these pistons achieve a refined material structure that ensures long-term performance under stress.\n\n### Advanced Engineering and Surface Technology\n\nPrecision is at the heart of the Vertex design. Using state-of-the-art CNC machining and diamond tooling, each piston is crafted to exact specifications. To further enhance longevity and efficiency, this piston features a specialized Molybdenum Bisulphite black coating, which aids in the break-in process and significantly reduces internal friction.\n\nThis piston also incorporates a high-tech phosphate coating. Inspired by developments in Formula One technology, this surface treatment offers a slight increase in hardness and provides superior adhesion for the Molybdenum coating, effectively doubling its durability compared to standard finishes.\n\n### Key Features\n\n \n- Precision Engineering: Manufactured with high-tech CNC machines for exact dimensional accuracy.\n \n- Durable Material: Constructed from specialized Low-Ex aluminium alloys for maximum thermal stability.\n \n- Superior Coating: Dual-layer protection using a Molybdenum Bisulphite finish supported by a phosphate base for reduced friction and extended wear.\n \n- Quality Assured: Every piston undergoes rigorous manual and automatic quality control inspections to ensure industry-leading standards.\n \n- Twin Ring Design: Engineered for optimal sealing and heat transfer within the cylinder bore.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/yamaha-yz-250-1990-1995-grade-a-6794mm-twin-ring-piston","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/d31dbd21be4d:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/d31dbd21be4d: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."]}}