{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"37062e868e27","name":"YAMAHA YZ 250 1999-2022 GRADE B 66.35mm TWIN RING PISTON","sku":"V.2584B","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":7,"price":{"amount":202.42,"formatted":"£202.42"},"summary":"Vertex pistons are manufactured using Low-Ex silicon aluminum alloys with 12%, 18%, or 21% silicon content depending on the application. They are made using gravity casting or hydraulic forging, followed by heat treatment in an automatic implant with solubilization by hot water quench. Machining is performed with the latest CNC machines, software, and diamond tools to achieve specific surface finishes. Each piston undergoes manual and automatic quality control. Vertex pistons feature a special Molybdenum Bisulphite black coating for break-in and friction reduction. A new phosphate coating, developed following Formula One engine advancements, offers increased hardness, light surface porosity, and superior adhesion and durability for the molybdenum coating. This piston has a 66.35mm bore diameter.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-250-1999-2020-grade-b-66.35mm-twin-ring-piston-7169-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-250-1999-2020-grade-b-66.35mm-twin-ring-piston-7169-p.jpg"],"description":"Vertex pistons are manufactured using Low-Ex silicon aluminum alloys with 12%, 18%, or 21% silicon content depending on the application. They are made using gravity casting or hydraulic forging, followed by heat treatment in an automatic implant with solubilization by hot water quench. Machining is performed with the latest CNC machines, software, and diamond tools to achieve specific surface finishes. Each piston undergoes manual and automatic quality control. Vertex pistons feature a special Molybdenum Bisulphite black coating for break-in and friction reduction. A new phosphate coating, developed following Formula One engine advancements, offers increased hardness, light surface porosity, and superior adhesion and durability for the molybdenum coating. This piston has a 66.35mm bore diameter.","descriptionMarkdown":"### Premium Grade B Twin Ring Piston\n\nUpgrade your engine performance with this high-quality Vertex Grade B twin ring piston. Engineered for precision and durability, this piston is designed to meet the rigorous demands of high-performance engines, ensuring optimal compression and efficient power delivery.\n\n### Advanced Materials and Manufacturing\n\nVertex pistons are crafted from specialized Low-Ex aluminium alloys, silicon-charged to provide excellent thermal stability and strength. The manufacturing process utilizes either gravity casting or hydraulic forging, followed by a state-of-the-art heat treatment process. This ensures a refined material structure capable of withstanding extreme operating temperatures and pressures.\n\n### Precision Engineering and Durability\n\nEach piston is machined using advanced CNC technology and diamond tooling to achieve exact surface finishes tailored to your engine requirements. To further enhance performance and longevity, the piston features a Molybdenum Bisulphite black coating, which reduces friction during the break-in period and throughout operation. The addition of a phosphate coating provides increased surface hardness and superior adhesion for the Molybdenum layer, significantly extending the durability of the coating.\n\n### Key Features\n\n \n- High-Performance Alloy: Constructed from Low-Ex aluminium with high silicon content for maximum expansion control.\n \n- Twin Ring Design: Engineered to provide an excellent seal for consistent compression and performance.\n \n- Reduced Friction: Molybdenum Bisulphite coating minimizes internal wear and eases the break-in process.\n \n- Phosphate Treated: Enhanced coating adhesion and surface hardness for long-lasting reliability.\n \n- Rigorous Quality Control: Every unit undergoes strict manual and automatic inspection processes to ensure peak quality standards.\n \n- Precision Machined: Utilizes CNC technology and diamond-tipped tooling for an exacting fit.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/yamaha-yz-250-1999-2022-grade-b-6635mm-twin-ring-piston","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/37062e868e27:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/37062e868e27:1"}},"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."]}}