{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"3e66aadd097f","name":"KTM SX 125 1987-1993 GRADE B 54.20mm DOME TOP","sku":"V.2293B","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":178.12,"formatted":"£178.12"},"summary":"KTM SX 125 1987-1993 GRADE B 54.20mm DOME TOP piston by Vertex. Manufactured using Low-Ex Silicon aluminium alloys. Features gravity cast or hydraulic forging, advanced heat treatment, and CNC machining with diamond tools for specific surface finishes. Includes Molybdenum Bisulphite black coating for break-in and friction reduction, and a newer Phosphate Coating for enhanced durability and adhesion. Rigorous quality control ensures high standards.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/ktm-sx-125-1987-1993-grade-b-54.20mm-dome-top-4675-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/ktm-sx-125-1987-1993-grade-b-54.20mm-dome-top-4675-p.jpg"],"description":"KTM SX 125 1987-1993 GRADE B 54.20mm DOME TOP piston by Vertex. Manufactured using Low-Ex Silicon aluminium alloys. Features gravity cast or hydraulic forging, advanced heat treatment, and CNC machining with diamond tools for specific surface finishes. Includes Molybdenum Bisulphite black coating for break-in and friction reduction, and a newer Phosphate Coating for enhanced durability and adhesion. Rigorous quality control ensures high standards.","descriptionMarkdown":"### Vertex Grade B 54.20mm Dome Top Piston\n\nThe Vertex Grade B 54.20mm dome top piston is engineered for riders seeking precision, durability, and high-performance reliability. Vertex utilizes advanced manufacturing techniques and exotic Low-Ex silicon-charged aluminum alloys to ensure optimal thermal expansion control and structural integrity under demanding engine conditions.\n\nEvery piston is crafted using either gravity casting or hydraulic forging, followed by a sophisticated heat treatment process in an automated implant to refine the material structure. This ensures that the piston maintains its shape and strength during high-stress operations.\n\n### Key Features\n\n \n- Advanced Alloy Construction: Manufactured with specialized aluminum alloys charged with high-percentage silicon for superior heat resistance and durability.\n \n- Precision Machining: CNC-machined using diamond-tipped tooling to achieve exact surface finishes tailored to specific engine requirements.\n \n- Dual-Layer Coating Technology: Features a Molybdenum Bisulphite black coating to reduce friction and facilitate a smoother engine break-in process.\n \n- Enhanced Durability: Incorporates a secondary all-over Phosphate coating. This development, inspired by Formula One technology, increases surface hardness and improves the adhesion of the Molybdenum layer, effectively doubling the coating durability.\n \n- Strict Quality Control: Each unit undergoes rigorous manual and automated testing to meet high manufacturing standards for consistent performance.\n\nBy combining cutting-edge metallurgy with precision engineering, the Vertex dome top piston provides a reliable solution for rebuilding or upgrading your engine. The specialized coatings help maintain optimal internal tolerances while reducing operational friction for a more efficient ride.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/ktm-sx-125-1987-1993-grade-b-5420mm-dome-top","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/3e66aadd097f:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/3e66aadd097f: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."]}}