{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"58f25aab7e63","name":"PISTON KIT 99-25 YZ250 66.40 C, PROX 01.2321.C RM250 03-12","sku":"56-W742.C.PX","brand":"Pro-X Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":155.9,"formatted":"£155.90"},"summary":"Piston kit with 66.40mm bore. Piston size is 66.37mm. ProX pistons are precision machined on CNC equipment using the same low-expansion, low-friction piston alloy as major Japanese engine manufacturers. This kit is a high-quality replacement for original pistons in motorcycles, scooters, mopeds, ATVs, and personal watercraft. Many ProX pistons feature an OEM style tin coating to assist break-in and a new skirt coating that reduces friction after break-in, increasing performance. Part number PROX 01.2321.C. Manufacturer: Pro-X Racing. Weight: 294g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"66.40mm"},{"label":"Variant Id","value":"257597"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock56543_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock56543_1.jpg"],"description":"Piston kit with 66.40mm bore. Piston size is 66.37mm. ProX pistons are precision machined on CNC equipment using the same low-expansion, low-friction piston alloy as major Japanese engine manufacturers. This kit is a high-quality replacement for original pistons in motorcycles, scooters, mopeds, ATVs, and personal watercraft. Many ProX pistons feature an OEM style tin coating to assist break-in and a new skirt coating that reduces friction after break-in, increasing performance. Part number PROX 01.2321.C. Manufacturer: Pro-X Racing. Weight: 294g.","descriptionMarkdown":"### ProX Piston Kit - 66.40mm Bore\n\nThis ProX Piston Kit is engineered for high performance and durability, offering a premium solution to replace your original piston. Precision machined using state-of-the-art CNC equipment, this kit utilizes the same low-expansion, low-friction piston alloy favored by major Japanese engine manufacturers.\n\n**Key Features:**\n\n \n- Bore Size: 66.40mm\n \n- Piston Size: 66.37mm\n \n- Constructed with a high-quality, low-expansion, low-friction piston alloy.\n \n- Features advanced skirt coating for improved performance and reduced friction after the break-in period.\n \n- Designed to assist the wear-in process, especially with the OEM style Tin coating.\n \n- Manufactured by Pro-X Racing, a trusted name in high-performance engine components.","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-c-prox-012321c-rm250-03-12","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/58f25aab7e63:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/58f25aab7e63:1"}},"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."]}}