{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"94357bf1c938","name":"CYLINDER FULL KIT 58MM YAMAHA YZ 125 97-04, ATHENA P400485100029 144CC BIG BORE, (Piston included)","sku":"56-K155.58.K.A","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":874.24,"formatted":"£874.24"},"summary":"Athena Big Bore Cylinder Kit Ø 58 mm, 144 cc P400485100029 includes a high-quality aluminum cylinder with increased bore, cylinder head, complete piston with piston pin and rings, and all necessary gaskets. Engineered in Italy, this kit features a motor-nicksil coating for smoothness and wear resistance. The cylinder kits are recognized worldwide for performance, durability, and reliability, guaranteeing an increase in performance while maintaining the reliability of original components. Components are developed to withstand high temperatures, pressures, and stresses, validated by Athena technicians. Installation does not require changes to the engine crankcase. Bore Diameter: 58.00 mm, Compression Ratio: 14.0:1, Displacement: 144 cc, Net Weight: 1.50 Kg.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"Variant Id","value":"252964"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K155_2E58_2EK_2EA/3fa84749fa027f99.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K155_2E58_2EK_2EA/3fa84749fa027f99.jpg"],"description":"Athena Big Bore Cylinder Kit Ø 58 mm, 144 cc P400485100029 includes a high-quality aluminum cylinder with increased bore, cylinder head, complete piston with piston pin and rings, and all necessary gaskets. Engineered in Italy, this kit features a motor-nicksil coating for smoothness and wear resistance. The cylinder kits are recognized worldwide for performance, durability, and reliability, guaranteeing an increase in performance while maintaining the reliability of original components. Components are developed to withstand high temperatures, pressures, and stresses, validated by Athena technicians. Installation does not require changes to the engine crankcase. Bore Diameter: 58.00 mm, Compression Ratio: 14.0:1, Displacement: 144 cc, Net Weight: 1.50 Kg.","descriptionMarkdown":"### Athena Big Bore Cylinder Kit 144cc for Yamaha YZ 125\n\nEnhance the performance of your Yamaha YZ 125 with this Athena Big Bore Cylinder Kit. Engineered by Athena's dedicated R&D Department in Italy, this kit features a 58mm bore diameter, increasing the displacement to 144cc. The cylinder is coated with Athena's proprietary 'Motor-Nicksil,' a nickel-silicon coating designed for optimal smoothness and superior wear resistance.\n\nThis high-performance kit guarantees a noticeable increase in power across the entire rev range while maintaining the reliability of original components. All parts within the kit are meticulously designed and tested to withstand extreme temperatures, pressures, and stresses.\n\n**Key Features:**\n\n \n- Increased Displacement: 144cc\n \n- Bore Diameter: 58.00 mm\n \n- Coated Cylinder: Motor-Nicksil for enhanced durability\n \n- High-Quality Aluminum Cylinder\n \n- Includes Cylinder Head\n \n- Complete Piston Kit: Piston, piston pin, and rings\n \n- All Necessary Gaskets Included\n \n- Compression Ratio: 14.0:1\n \n- Designed for high temperatures, pressures, and stresses\n \n- Can be installed without modifications to the crankcase\n \n- Engineered and tested by Athena technicians\n\n**Technical Specifications:**\n\n \n- Bore Diameter: 58.00 mm\n \n- Compression Ratio: 14.0:1\n \n- Displacement: 144 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-58mm-yamaha-yz-125-97-04-athena-p400485100029-144cc-big-bore-p","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/94357bf1c938:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/94357bf1c938:1"}},"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."]}}