{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"fa31c222148f","name":"YAMAHA YZ 125 2005-2021 GRADE B 53.94mm SINGLE RING PISTON","sku":"V.3119B","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":11,"price":{"amount":178.12,"formatted":"£178.12"},"summary":"Vertex pistons are manufactured using Low-Ex aluminium alloys with 12%, 18% or 21% silicon, produced via gravity casting or hydraulic forging. A heat treatment process refines the material structure, followed by CNC machining with diamond tools for specific surface finishes. Every Vertex piston undergoes rigorous quality control. Vertex pistons feature a Molybdenum Bisulphite black coating for break-in and friction reduction, and a Phosphate Coating for increased hardness, surface porosity, and Molybdenum Coating adhesion, doubling coating durability. This is a Grade B, 53.94mm single ring piston.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-125-2005-2020-grade-b-53.94mm-single-ring-piston-1592-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/yamaha-yz-125-2005-2020-grade-b-53.94mm-single-ring-piston-1592-p.jpg"],"description":"Vertex pistons are manufactured using Low-Ex aluminium alloys with 12%, 18% or 21% silicon, produced via gravity casting or hydraulic forging. A heat treatment process refines the material structure, followed by CNC machining with diamond tools for specific surface finishes. Every Vertex piston undergoes rigorous quality control. Vertex pistons feature a Molybdenum Bisulphite black coating for break-in and friction reduction, and a Phosphate Coating for increased hardness, surface porosity, and Molybdenum Coating adhesion, doubling coating durability. This is a Grade B, 53.94mm single ring piston.","descriptionMarkdown":"### Vertex Grade B 53.94mm Single Ring Piston\n\nThe Vertex Grade B Single Ring Piston is engineered for high performance and durability, utilizing exotic Low-Expansion (Low-Ex) silicon-charged aluminium alloys. By incorporating 12%, 18%, or 21% silicon content depending on the specific application, these pistons offer superior structural integrity and thermal resistance.\n\nVertex employs advanced manufacturing processes, including gravity casting or hydraulic forging, followed by a precision-controlled heat treatment cycle. This ensures a refined material structure that meets the rigorous demands of competitive engine performance.\n\n**Key Features:**\n\n- Precision Machining: Produced using state-of-the-art CNC technology and diamond tooling for exact surface finishes.\n\n- Advanced Coatings: Features a Molybdenum Bisulphite black coating to assist in the break-in process and reduce internal friction.\n\n- Phosphate Coating: Includes an all-over phosphate treatment that increases surface hardness and provides light porosity for superior adhesion of the Molybdenum coating, significantly extending durability.\n\n- Quality Assurance: Every piston undergoes a thorough manual and automatic quality control inspection to ensure peak performance standards.\n\n- Specific Sizing: Grade B piston with a 53.94mm diameter designed for optimal cylinder clearance.\n\nWhether you are performing a routine rebuild or a high-performance engine upgrade, this Vertex piston provides the reliability and technical advancement required for consistent power delivery.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/yamaha-yz-125-2005-2021-grade-b-5394mm-single-ring-piston","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/fa31c222148f:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/fa31c222148f: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."]}}