{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"d205e35a91af","name":"HONDA RS 125 2003-2009 GRADE B 53.95mm DOME HEAD .78mm RING","sku":"V.3105B","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":4,"price":{"amount":291.52,"formatted":"£291.52"},"summary":"Vertex pistons are manufactured using Low-Ex aluminium alloys with 12%, 18%, or 21% silicon, depending on the application. Pistons are produced using gravity casting or hydraulic forging, followed by heat treatment in an automatic HT implant with solubilization by quench in hot water. Machining is performed using CNC machines 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 offers increased hardness, light surface porosity, and superior adhesion qualities, extending coating durability. This piston has a dome head, measures 53.95mm, and has a 0.78mm ring.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/honda-rs-125-2003-2009-grade-b-53.95mm-dome-head-.78mm-ring-3821-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/honda-rs-125-2003-2009-grade-b-53.95mm-dome-head-.78mm-ring-3821-p.jpg"],"description":"Vertex pistons are manufactured using Low-Ex aluminium alloys with 12%, 18%, or 21% silicon, depending on the application. Pistons are produced using gravity casting or hydraulic forging, followed by heat treatment in an automatic HT implant with solubilization by quench in hot water. Machining is performed using CNC machines 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 offers increased hardness, light surface porosity, and superior adhesion qualities, extending coating durability. This piston has a dome head, measures 53.95mm, and has a 0.78mm ring.","descriptionMarkdown":"### Vertex High-Performance Racing Piston\n\nEngineered for peak performance, this Vertex piston is a professional-grade component designed to meet the rigorous demands of racing environments. Trusted by top-tier squads like the Honda Gresini race team, Vertex pistons provide the durability and precision required for competitive engine builds.\n\n### Advanced Manufacturing and Material Quality\n\nVertex utilizes exotic Low-Ex (low expansion) aluminium alloys, with silicon content specifically calibrated for high-performance applications. Each piston undergoes a sophisticated manufacturing process, including either gravity casting or hydraulic forging, followed by a state-of-the-art heat treatment in an automatic implant with hot water quenching. This process refines the material structure for maximum strength and structural integrity.\n\n### Precision Machining and Coatings\n\nEvery piston is machined using advanced CNC technology and precision diamond tools to achieve specific surface finishes. To ensure optimal longevity and reduced friction, this piston features a dual-layer coating system:\n\n \n- Molybdenum Bisulphite Coating: A specialized black coating that assists during the initial break-in period and significantly reduces internal engine friction.\n \n- Phosphate Coating: Borrowing technology from Formula One, this coating provides a slight increase in surface hardness and a light porosity that improves Molybdenum adhesion. This development doubles the durability of the protective coating.\n\n### Key Technical Specifications\n\n \n- Design: Dome head configuration\n \n- Grade: B\n \n- Diameter: 53.95mm\n \n- Ring Size: 0.78mm\n \n- Quality Assurance: Subjected to rigorous manual and automatic quality control inspections to ensure industry-leading standards.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/honda-rs-125-2003-2009-grade-b-5395mm-dome-head-78mm-ring","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/d205e35a91af:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/d205e35a91af: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."]}}