{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"81e5f0493a74","name":"CYLINDER FULL KIT 54MM YAMAHA YZ 125 97-04, ATHENA P400485100003 STD BORE, (Piston Included)","sku":"56-K155.54.CKA","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":802.27,"formatted":"£802.27"},"summary":"ATHENA Standard Bore Cylinder Kit 54mm 125cc. Includes cylinder, cylinder head with interchangeable central dome, complete piston with pin and rings, and all necessary gaskets. Cylinder features a nickel-silicon coating for smoothness and wear resistance. Bore Diameter: 54.00 mm. Compression Ratio: 14.8:1. Displacement: 125cc. Net Weight: 1.50 Kg. Part Number: P400485100003.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"General Size","value":"54mm"},{"label":"Variant Id","value":"252960"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K155_2E54_2ECKA/a0870da1b446a673.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K155_2E54_2ECKA/a0870da1b446a673.jpg"],"description":"ATHENA Standard Bore Cylinder Kit 54mm 125cc. Includes cylinder, cylinder head with interchangeable central dome, complete piston with pin and rings, and all necessary gaskets. Cylinder features a nickel-silicon coating for smoothness and wear resistance. Bore Diameter: 54.00 mm. Compression Ratio: 14.8:1. Displacement: 125cc. Net Weight: 1.50 Kg. Part Number: P400485100003.","descriptionMarkdown":"### Athena Standard Bore Cylinder Kit 54mm 125cc\n\nThis Athena Standard Bore Cylinder Kit is engineered for optimal performance and reliability. Manufactured in Italy by Athena's expert R&D department, this kit features a lightweight aluminum cylinder coated with motor-nicksil, a proprietary nickel-silicon coating developed for exceptional smoothness and wear resistance. The included piston is designed to minimize friction, further enhancing efficiency.\n\nThis comprehensive kit includes a high-quality aluminum cylinder with a standard bore, a cylinder head with an interchangeable central dome, a complete piston assembly with pin and rings, and all necessary gaskets. Engineered to withstand extreme temperatures, pressures, and stresses, each component has undergone rigorous bench and road testing by Athena technicians.\n\nThe Athena Standard Bore Cylinder Kit is designed to deliver performance comparable to original spare parts, ensuring excellent reliability and smoothness. Installation requires no modifications to the engine crankcase.\n\n**Key Features:**\n\n \n- Standard Bore Diameter: 54.00 mm\n \n- Displacement: 125 cc\n \n- Compression Ratio: 14.8:1\n \n- Motor-nicksil coating for durability and smoothness\n \n- Lightweight aluminum construction\n \n- Piston designed for reduced friction\n \n- Includes cylinder head, piston kit, and all required gaskets\n \n- No engine crankcase modifications needed for installation\n\n**Technical Specifications:**\n\n \n- Bore Diameter: 54.00 mm\n \n- Compression Ratio: 14.8:1\n \n- Displacement: 125 cc\n \n- Net Weight: 1.50 kg","weightGrams":null,"fitments":[{"make":"GAS-GAS","model":"EC 125","cc":null,"notes":null,"years":"2013–2015"},{"make":"YAMAHA","model":"YZ 125","cc":null,"notes":null,"years":"1997–2019"}],"collections":[{"name":"Engine","url":"https://www.2brosparts.com/api/agent/collection/GB/engine"},{"name":"Cylinder Kits","url":"https://www.2brosparts.com/api/agent/collection/GB/cylinder-kits"}],"links":{"page":"https://www.2brosparts.com/products/cylinder-full-kit-54mm-yamaha-yz-125-97-04-athena-p400485100003-std-bore-piston-","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/81e5f0493a74:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/81e5f0493a74:1"}},"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."]}}