{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"c1fbf2f06038","name":"CYLINDER FULL KIT 53mm 2002-2018 YAMAHA YZ85 ATHENA P400485100038 105CC BIG BORE Piston included","sku":"56-K154.53.KIT","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":617.94,"formatted":"£617.94"},"summary":"ATHENA Big Bore Cylinder Kit 53 mm 105 cc with Cylinder Head included. The kit includes a high-quality aluminum cylinder with increased bore, cylinder head, complete piston with piston pin and rings, and all necessary gaskets. Cylinders are coated with motor-nicksil, a nickel-silicon coating for smoothness and wear resistance. Developed to withstand high temperatures, pressures, and stresses. Can be installed without engine crankcase modification. Bore Diameter 53.00 mm, Compression Ratio 13.8:1, Displacement 105 cc. Net Weight 1.40 Kg. Partner Cross Reference codes include S4F05300002A, S4F05300002C, S4F05300002B Piston Kits, P400485160023 Gaskets Kit, S410485308021 Cylinder Head, S41316209 Rings, S41317051 Piston Pin.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"General Size","value":"53mm"},{"label":"Variant Id","value":"252955"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K154_2E53_2EKIT/c1b6a6d9a51868d1.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K154_2E53_2EKIT/c1b6a6d9a51868d1.jpg"],"description":"ATHENA Big Bore Cylinder Kit 53 mm 105 cc with Cylinder Head included. The kit includes a high-quality aluminum cylinder with increased bore, cylinder head, complete piston with piston pin and rings, and all necessary gaskets. Cylinders are coated with motor-nicksil, a nickel-silicon coating for smoothness and wear resistance. Developed to withstand high temperatures, pressures, and stresses. Can be installed without engine crankcase modification. Bore Diameter 53.00 mm, Compression Ratio 13.8:1, Displacement 105 cc. Net Weight 1.40 Kg. Partner Cross Reference codes include S4F05300002A, S4F05300002C, S4F05300002B Piston Kits, P400485160023 Gaskets Kit, S410485308021 Cylinder Head, S41316209 Rings, S41317051 Piston Pin.","descriptionMarkdown":"### Athena 105cc Big Bore Cylinder Kit for Yamaha YZ85 (2002-2018)\n\n Upgrade your Yamaha YZ85 with this high-performance Big Bore Cylinder Kit from Athena. This comprehensive kit is engineered in Italy and designed to significantly increase your engine's performance while maintaining the reliability of original components. Athena's dedication to quality is evident in their advanced manufacturing processes and rigorous testing.\n\n The cylinder features a specialized motor-nicksil coating, a nickel-silicon blend developed by Athena for exceptional smoothness and superior wear resistance. This ensures longevity and optimal performance even under demanding conditions. This kit is designed to provide an observable increase in power across the entire rev range.\n\n This kit includes everything needed for installation: a high-quality aluminum cylinder with an increased bore diameter, a precision-engineered cylinder head, a complete piston assembly with piston pin and rings, and all necessary gaskets. All components are built to withstand extreme temperatures, pressures, and stresses, validated through extensive bench and road testing by Athena technicians. Importantly, this cylinder kit can be installed without requiring any modifications to the engine crankcase.\n\n#### Key Features:\n\n \n- Increased Displacement: Boosts your engine to 105cc for enhanced power.\n \n- Athena Motor-Nicksil Coating: Provides superior smoothness and wear resistance for durability.\n \n- Complete Kit: Includes aluminum cylinder, cylinder head, piston kit, and all required gaskets.\n \n- Direct Installation: Designed for fitment without engine crankcase modifications.\n \n- Performance Enhancement: Guarantees a noticeable increase in power output.\n \n- Italian Engineering: Developed and tested by Athena's R&D department.\n\n#### Technical Specifications:\n\n \n- Bore Diameter: 53.00 mm\n \n- Compression Ratio: 13.8:1\n \n- Displacement: 105 cc\n \n- Net Weight: 1.40 Kg","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"YZ 85","cc":null,"notes":null,"years":"2002–2019"}],"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-53mm-2002-2018-yamaha-yz85-athena-p400485100038-105cc-big-bore","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/c1fbf2f06038:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/c1fbf2f06038:1"}},"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."]}}