{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"cbb015bb5af6","name":"PISTON KIT 99-25 YZ250 66.40 B, PROX 01.2321.B RM250 03-12","sku":"56-W742.B.PX","brand":"Pro-X Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":155.9,"formatted":"£155.90"},"summary":"ProX Piston Kit with a 66.40mm bore size. The piston size is 66.36mm. This piston kit is manufactured using state-of-the-art CNC equipment with a low-expansion, low-friction piston alloy, matching that used by major Japanese engine manufacturers. ProX Piston Kits offer a high-quality replacement for original pistons in motorcycles, scooters, mopeds, ATVs, and personal watercraft. Many ProX pistons feature a Tin coating to aid the wear-in process and a new skirt coating designed to reduce friction after break-in, contributing to increased performance. The kit includes part number 01.2321.B.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"66.40mm"},{"label":"Variant Id","value":"257593"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock56539_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock56539_1.jpg"],"description":"ProX Piston Kit with a 66.40mm bore size. The piston size is 66.36mm. This piston kit is manufactured using state-of-the-art CNC equipment with a low-expansion, low-friction piston alloy, matching that used by major Japanese engine manufacturers. ProX Piston Kits offer a high-quality replacement for original pistons in motorcycles, scooters, mopeds, ATVs, and personal watercraft. Many ProX pistons feature a Tin coating to aid the wear-in process and a new skirt coating designed to reduce friction after break-in, contributing to increased performance. The kit includes part number 01.2321.B.","descriptionMarkdown":"### ProX Piston Kit 66.40mm Bore\n\nUpgrade your engine's performance and reliability with this precision-engineered ProX Piston Kit. Designed to meet the exacting standards of major Japanese engine manufacturers, this kit features a piston machined on state-of-the-art CNC equipment using a low-expansion, low-friction alloy.\n\nThis ProX Piston Kit offers a premium solution to replace your original piston, ensuring optimal performance for your powersports vehicle.\n\n#### Key Features:\n\n \n- Piston Bore Size: 66.40mm\n \n- Piston Diameter: 66.36mm\n \n- Crafted with a low-expansion, low-friction piston alloy.\n \n- Coated for ultimate performance and reduced friction.\n \n- Tin coating assists the wear-in process and reduces friction after wear-in.\n \n- Black skirt coating is a unique blend of materials to increase performance.\n \n- Precision machined using the latest CNC equipment.","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-b-prox-012321b-rm250-03-12","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/cbb015bb5af6:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/cbb015bb5af6:1"}},"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."]}}