{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"090ee78e098f","name":"KTM SX 125 1987-1993 GRADE C 54.21mm DOME TOP","sku":"V.2293C","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":178.12,"formatted":"£178.12"},"summary":"Vertex pistons are manufactured using Low-Ex aluminium alloys with 12%, 18%, or 21% silicon content depending on the application. They are produced using gravity cast or hydraulic forging processes, followed by heat treatment in an automatic HT implant with solubilization by quench in hot water. Machining is performed on the latest CNC machines using diamond tools to achieve specific surface finishes. Each Vertex piston undergoes rigorous manual and automatic quality control. Vertex pistons are coated with Molybdenum Bisulphite for break-in and friction reduction, and a new Phosphate Coating offers increased hardness and surface porosity for superior Molybdenum Coating adhesion and durability. This is a GRADE C 54.21mm DOME TOP piston.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/ktm-sx-125-1987-1993-grade-c-54.21mm-dome-top-4672-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/ktm-sx-125-1987-1993-grade-c-54.21mm-dome-top-4672-p.jpg"],"description":"Vertex pistons are manufactured using Low-Ex aluminium alloys with 12%, 18%, or 21% silicon content depending on the application. They are produced using gravity cast or hydraulic forging processes, followed by heat treatment in an automatic HT implant with solubilization by quench in hot water. Machining is performed on the latest CNC machines using diamond tools to achieve specific surface finishes. Each Vertex piston undergoes rigorous manual and automatic quality control. Vertex pistons are coated with Molybdenum Bisulphite for break-in and friction reduction, and a new Phosphate Coating offers increased hardness and surface porosity for superior Molybdenum Coating adhesion and durability. This is a GRADE C 54.21mm DOME TOP piston.","descriptionMarkdown":"### Vertex High-Performance Piston - 54.21mm Dome Top\n\nEngineered for precision and reliability, this Vertex piston is designed to meet the rigorous demands of high-performance engines. Manufactured using advanced aluminium alloys and cutting-edge production techniques, this piston offers the durability and efficiency required for competitive riding and engine rebuilding.\n\n### Key Features and Construction\n\n \n- Advanced Alloy Composition: Constructed from Low-Ex (low expansion) silicon-charged aluminium alloys to ensure structural integrity and thermal stability.\n \n- Precision Manufacturing: Produced through state of the art gravity casting or hydraulic forging processes. The material structure is further refined using an automated, high-tech heat treatment process for maximum strength.\n \n- CNC Machined: Finished using advanced CNC machinery and diamond-tipped tooling to achieve the precise surface finishes necessary for optimal engine performance.\n \n- Enhanced Coatings: Features a Molybdenum Bisulphite black coating to assist with the break-in process and reduce internal friction.\n \n- Phosphate Coating Technology: Incorporates a secondary phosphate coating, inspired by Formula One technology, to provide superior adhesion for the Molybdenum layer. This results in double the coating durability compared to standard finishes.\n \n- Rigorous Quality Control: Each piston undergoes strict manual and automatic inspection processes to ensure it meets the highest standards of quality and performance.\n\nWhether you are performing a full engine rebuild or replacing worn components, Vertex pistons provide the engineering excellence needed to restore power and maintain engine longevity.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/ktm-sx-125-1987-1993-grade-c-5421mm-dome-top","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/090ee78e098f:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/090ee78e098f: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."]}}