{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"20529a1c6ad1","name":"HONDA NSR JC22 KY4 CRM 125 GRADE D 53.99mm TWIN RING PISTON","sku":"V.1972D","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":161.92,"formatted":"£161.92"},"summary":"Vertex pistons are manufactured using Low-Ex Silicon aluminium alloys with 12%, 18%, or 21% silicon depending on the application. They are made using gravity cast or hydraulic forging processes, with material structure refined through a hi-tech Heat Treatment process. Machining is completed using CNC machines and diamond tools to achieve specific surface finishes. Each Vertex piston undergoes rigorous manual and automatic quality control. Vertex pistons are coated with a special Molybdenum Bisulphite black coating for break-in and friction reduction. A new Phosphate Coating, used in Formula One engines, offers increased hardness and superior adhesion for extended durability. This twin ring piston has a bore size of 53.99mm.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/honda-nsr-jc22-ky4-crm-125-grade-c-53.98mm-twin-ring-piston-5462-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/honda-nsr-jc22-ky4-crm-125-grade-c-53.98mm-twin-ring-piston-5462-p.jpg"],"description":"Vertex pistons are manufactured using Low-Ex Silicon aluminium alloys with 12%, 18%, or 21% silicon depending on the application. They are made using gravity cast or hydraulic forging processes, with material structure refined through a hi-tech Heat Treatment process. Machining is completed using CNC machines and diamond tools to achieve specific surface finishes. Each Vertex piston undergoes rigorous manual and automatic quality control. Vertex pistons are coated with a special Molybdenum Bisulphite black coating for break-in and friction reduction. A new Phosphate Coating, used in Formula One engines, offers increased hardness and superior adhesion for extended durability. This twin ring piston has a bore size of 53.99mm.","descriptionMarkdown":"### Vertex 53.99mm Twin Ring Piston (Grade D)\n\nEngineered for high performance and reliability, the Vertex 53.99mm Twin Ring Piston is a premium replacement component designed to meet the rigorous demands of two-stroke engines. Trusted by professional racing teams, including the Honda Gresini race team, Vertex pistons provide superior durability and efficiency for your engine rebuild.\n\nThis piston is manufactured using advanced low-expansion silicon-charged aluminium alloys. Through a sophisticated gravity casting or hydraulic forging process, the structural integrity of the metal is refined via high-tech heat treatment, ensuring maximum strength and resistance to thermal stress.\n\n### Key Features\n\n \n- Advanced Alloy Composition: Utilizes low-expansion silicon-charged aluminium to maintain precise tolerances under varying engine temperatures.\n \n- Precision Machining: CNC-machined using diamond tools to achieve exacting surface finishes and optimal fitment within the cylinder.\n \n- Enhanced Durability: Features an all-over phosphate coating that increases surface hardness and provides a porous texture for superior Molybdenum Bisulphite adhesion.\n \n- Reduced Friction: The specialised Molybdenum Bisulphite black coating significantly reduces friction during the critical break-in period and throughout the piston lifecycle.\n \n- Quality Assured: Every piston undergoes a comprehensive manual and automatic quality control process to ensure consistent, race-grade performance.\n\nWhether you are restoring your engine to factory specifications or preparing for competitive riding, this Vertex twin-ring piston offers the advanced material science and manufacturing precision required for optimal power delivery and long-term reliability.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/honda-nsr-jc22-ky4-crm-125-grade-d-5399mm-twin-ring-piston","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/20529a1c6ad1:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/20529a1c6ad1:1"}},"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."]}}