{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"9901f96fd400","name":"CYLINDER FULL RACE KIT 54MM YAMAHA YZ 125 22-25, ATHENA P400485100102 STD BORE, (Piston included)","sku":"56-K1993.54.CKA.RACE","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":864.42,"formatted":"£864.42"},"summary":"The Athena Standard Bore Racing Cylinder Kit features a 54mm bore size and is designed for high-performance applications. It includes a high-performance aluminum cylinder with precision-machined intake and exhaust ports for optimized combustion efficiency. The racing cylinder head has a modular bronze insert for superior heat dissipation and thermodynamic performance. The kit comes with a lightweight single-ring piston with Oil Dot technology for reduced friction and enhanced lubrication. Engineered for increased power output, throttle responsiveness, and mechanical reliability, this kit is designed for seamless compatibility with OEM engine components. Specifications include a 54mm bore size, aluminum cylinder material with optimized porting, a modular bronze head insert, and a lightweight single-ring piston with Oil Dots. The kit includes the cylinder, head with insert, piston, and associated hardware. Cross-reference OEM part number: P400485100102.","attributes":[],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K1993_2E54_2ECKA_2ERACE/42cafc272b35e3d4.png","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K1993_2E54_2ECKA_2ERACE/42cafc272b35e3d4.png"],"description":"The Athena Standard Bore Racing Cylinder Kit features a 54mm bore size and is designed for high-performance applications. It includes a high-performance aluminum cylinder with precision-machined intake and exhaust ports for optimized combustion efficiency. The racing cylinder head has a modular bronze insert for superior heat dissipation and thermodynamic performance. The kit comes with a lightweight single-ring piston with Oil Dot technology for reduced friction and enhanced lubrication. Engineered for increased power output, throttle responsiveness, and mechanical reliability, this kit is designed for seamless compatibility with OEM engine components. Specifications include a 54mm bore size, aluminum cylinder material with optimized porting, a modular bronze head insert, and a lightweight single-ring piston with Oil Dots. The kit includes the cylinder, head with insert, piston, and associated hardware. Cross-reference OEM part number: P400485100102.","descriptionMarkdown":"### Athena 54mm Full Race Cylinder Kit for Yamaha YZ 125\n\nEnhance the performance of your Yamaha YZ 125 with the Athena Standard Bore Racing Cylinder Kit. This high-performance kit is engineered for optimal power delivery and superior thermal management, making it ideal for demanding racing applications. The 54mm bore size and precision components contribute to increased responsiveness and durability.\n\n#### Key Features:\n\n\t\n- High-performance aluminium cylinder with precision-machined intake and exhaust ports for optimized combustion efficiency.\n\t\n- Racing cylinder head features a modular bronze insert for superior heat dissipation and thermodynamic performance.\n\t\n- Lightweight single-ring piston equipped with Oil Dot technology for reduced friction and enhanced lubrication.\n\t\n- Engineered to deliver increased power output, improved throttle response, and enhanced mechanical reliability.\n\t\n- Designed for seamless integration with OEM engine components.\n\n#### Specifications:\n\n\t\n- Bore Size: 54mm (Standard Bore)\n\t\n- Cylinder Material: Aluminium with optimized porting\n\t\n- Cylinder Head Insert: Modular bronze design\n\t\n- Piston Type: Lightweight, single-ring with Oil Dots\n\t\n- Kit Contents: Cylinder, head with insert, piston, and necessary hardware.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/cylinder-full-race-kit-54mm-yamaha-yz-125-22-25-athena-p400485100102-std-bore-pi","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/9901f96fd400:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/9901f96fd400:1"}},"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."]}}