{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"11b680e6356e","name":"PISTON KIT 99-25 YZ250 66.40 A, PROX 01.2321.A RM250 03-12","sku":"56-W742.A.PX","brand":"Pro-X Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":155.9,"formatted":"£155.90"},"summary":"ProX piston kit with 66.40mm bore. This kit features a low-expansion, low-friction piston alloy, the same used by major Japanese engine manufacturers. ProX pistons are precision machined on CNC equipment. This piston kit is a first-class replacement for the original piston in your Motorcycle, Scooter, Moped, ATV, or Personal Watercraft. Coated for ultimate performance, the OEM style Tin coating assists the wear-in process, and a new skirt coating reduces friction after wear-in, increasing performance. Includes piston size: 66.35mm. Manufacturer part number: 01.2321.A. Weight: 296g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"66.40mm"},{"label":"Variant Id","value":"257589"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W742_2EA_2EPX/d1745a425aa58470.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W742_2EA_2EPX/d1745a425aa58470.jpg"],"description":"ProX piston kit with 66.40mm bore. This kit features a low-expansion, low-friction piston alloy, the same used by major Japanese engine manufacturers. ProX pistons are precision machined on CNC equipment. This piston kit is a first-class replacement for the original piston in your Motorcycle, Scooter, Moped, ATV, or Personal Watercraft. Coated for ultimate performance, the OEM style Tin coating assists the wear-in process, and a new skirt coating reduces friction after wear-in, increasing performance. Includes piston size: 66.35mm. Manufacturer part number: 01.2321.A. Weight: 296g.","descriptionMarkdown":"### ProX Piston Kit 66.40mm Bore\n\nThis ProX Piston Kit is engineered for optimal performance and durability. Featuring a 66.40mm bore and a 66.35mm piston size, this kit is crafted using state-of-the-art CNC equipment. The alloy used is the same low-expansion, low-friction material favored by major Japanese engine manufacturers, ensuring a high-quality replacement for your original piston.\n\n**Key Features:**\n\n \n- Precision machined using advanced CNC equipment.\n \n- Utilizes a low-expansion, low-friction piston alloy.\n \n- Designed as a premium replacement for original pistons.\n \n- Includes advanced skirt coating to aid the initial wear-in process and reduce friction.\n \n- Coating is a proprietary blend designed to enhance performance.\n\nThis ProX piston kit offers a first-class solution for various powersports applications, enhancing both the break-in period and long-term running efficiency of your engine.","weightGrams":null,"fitments":[{"make":"FANTIC","model":"XX 250","cc":null,"notes":null,"years":"2022–2025"},{"make":"SUZUKI","model":"RM 250","cc":null,"notes":null,"years":"2003–2012"},{"make":"YAMAHA","model":"YZ 250","cc":null,"notes":null,"years":"1999–2025"},{"make":"YAMAHA","model":"YZ 250X","cc":null,"notes":null,"years":"2016–2025"}],"collections":[{"name":"Engine","url":"https://www.2brosparts.com/api/agent/collection/GB/engine"},{"name":"Pistons & Kits","url":"https://www.2brosparts.com/api/agent/collection/GB/pistons-kits"}],"links":{"page":"https://www.2brosparts.com/products/piston-kit-99-25-yz250-6640-a-prox-012321a-rm250-03-12","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/11b680e6356e:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/11b680e6356e: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."]}}