{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"2a60311feecd","name":"HONDA CR 250 2005-2007 GRADE B 66.35mm TWIN RING REPLICA PISTON","sku":"V.3137B","brand":"Vertex","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":218.62,"formatted":"£218.62"},"summary":"Vertex pistons are manufactured using Low-Ex aluminum 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 hot water quenching. Machining is performed on the latest CNC machines with diamond tools to achieve specific surface finishes. Every 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 has been introduced, offering increased hardness and light surface porosity for superior adhesion and durability of the Molybdenum Coating. This piston is a Grade B, twin ring, replica piston with a bore of 66.35mm.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/honda-cr-250-2005-2007-grade-b-66.35mm-twin-ring-replica-2106-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/honda-cr-250-2005-2007-grade-b-66.35mm-twin-ring-replica-2106-p.jpg"],"description":"Vertex pistons are manufactured using Low-Ex aluminum 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 hot water quenching. Machining is performed on the latest CNC machines with diamond tools to achieve specific surface finishes. Every 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 has been introduced, offering increased hardness and light surface porosity for superior adhesion and durability of the Molybdenum Coating. This piston is a Grade B, twin ring, replica piston with a bore of 66.35mm.","descriptionMarkdown":"### Premium Vertex Twin Ring Replica Piston\n\nThe Vertex Grade B 66.35mm Twin Ring Replica Piston is engineered to meet the demanding requirements of high performance two stroke engines. Manufactured using advanced aluminium alloys and state of the art production techniques, this piston provides exceptional reliability and consistent engine performance.\n\n### Advanced Materials and Engineering\n\nVertex utilizes proprietary Low-Ex (low expansion) aluminium alloys, with silicon content specifically calibrated for this application. The blanks are produced through a precise gravity cast or hydraulic forging process, followed by a sophisticated automated heat treatment cycle. This ensures a refined material structure that delivers superior strength and heat resistance.\n\n### Precision Manufacturing\n\nEvery piston is machined using high tech CNC equipment and diamond tipped tooling. This level of precision allows for specific surface finishes optimized for internal engine environments, ensuring a perfect seal and long service life. Every unit undergoes rigorous manual and automated quality control inspections to meet strict engineering tolerances.\n\n### Enhanced Coatings for Performance\n\nTo maximize durability and minimize friction, this piston features a dual layer coating system:\n\n- Molybdenum Bisulphite Coating: A high performance black coating applied to the piston skirt to facilitate a smooth break in period and reduce internal engine friction.\n\n- Phosphate Coating: Borrowing technology from Formula One engines, the addition of a phosphate coating provides increased surface hardness and light porosity. This creates superior adhesion for the Molybdenum layer, effectively doubling the durability of the piston coating.\n\n### Key Features\n\n- Designed as a twin ring replica for optimal compression and ring seal.\n\n- Engineered with low expansion alloy for consistent clearance during thermal cycling.\n\n- Professional grade CNC machining for exact tolerances.\n\n- Advanced surface treatments to reduce wear and extend component life.\n\n- Ready for high performance maintenance and top end rebuilds.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/honda-cr-250-2005-2007-grade-b-6635mm-twin-ring-replica-piston","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/2a60311feecd:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/2a60311feecd: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."]}}