{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"a9a67ef4ccf6","name":"CYLINDER TOP END KIT YAMAHA 1989-2004 BEAR TRACKER 250 OEM SPEC REPLACEMENT","sku":"56-K288.71.KIT","brand":"Dirt Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":153.35,"formatted":"£153.35"},"summary":"This Cylinder Top End Kit is a high-quality aftermarket replacement designed for Yamaha Bear Tracker 250, Timberwolf 250, and Moto-4 250 models. It includes all necessary components to rebuild your engine's top end, ensuring restored performance and reliability. The kit features a high-grade cast aluminium cylinder and a forged aluminium piston with a molybdenum Teflon-coated skirt for reduced friction and extended lifespan. The piston dome is anodized for superior heat resistance, and the included gaskets are made from performance materials to enhance durability. Professional installation is recommended. Features include a high-grade cast aluminium cylinder, forged aluminium piston with molybdenum Teflon-coated skirt, anodized piston dome, and performance gaskets for increased durability and reliability. The complete kit includes piston, rings, pin, clips, and top-end gasket set. Specifications: Cylinder Bore and Stroke: 71.00mm x 58.00mm. Cylinder Material: High-grade cast aluminium. Piston Material: Forged aluminium. Cross-Reference OEM Part Numbers: 4BD-11310-01-00, 5VC-11351-01-00, 4BD-11631-00-Y0, 4BD-11610-00-00, 29U-11633-00-00, 93450-17044-00, DR7-EA000-00-00, 3GH-11181-00-00.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Cylinder Kits"},{"label":"Variant Id","value":"303485"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K288_2E71_2EKIT/3d27c6ad0d4290b8.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K288_2E71_2EKIT/3d27c6ad0d4290b8.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K288_2E71_2EKIT/d867afa0b4261463.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K288_2E71_2EKIT/bd11e2192536017a.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K288_2E71_2EKIT/49b213132428de84.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K288_2E71_2EKIT/c51b36f56431d528.jpg"],"description":"This Cylinder Top End Kit is a high-quality aftermarket replacement designed for Yamaha Bear Tracker 250, Timberwolf 250, and Moto-4 250 models. It includes all necessary components to rebuild your engine's top end, ensuring restored performance and reliability. The kit features a high-grade cast aluminium cylinder and a forged aluminium piston with a molybdenum Teflon-coated skirt for reduced friction and extended lifespan. The piston dome is anodized for superior heat resistance, and the included gaskets are made from performance materials to enhance durability. Professional installation is recommended. Features include a high-grade cast aluminium cylinder, forged aluminium piston with molybdenum Teflon-coated skirt, anodized piston dome, and performance gaskets for increased durability and reliability. The complete kit includes piston, rings, pin, clips, and top-end gasket set. Specifications: Cylinder Bore and Stroke: 71.00mm x 58.00mm. Cylinder Material: High-grade cast aluminium. Piston Material: Forged aluminium. Cross-Reference OEM Part Numbers: 4BD-11310-01-00, 5VC-11351-01-00, 4BD-11631-00-Y0, 4BD-11610-00-00, 29U-11633-00-00, 93450-17044-00, DR7-EA000-00-00, 3GH-11181-00-00.","descriptionMarkdown":"### Yamaha Cylinder Top End Kit 250cc Replacement\n\nRestore your Yamaha's engine performance with this high-quality aftermarket Cylinder Top End Kit. Designed as a direct replacement, this kit provides all the essential components needed for a comprehensive top-end rebuild, ensuring your motorcycle runs smoothly and reliably.\n\n**Key Features:**\n\n \n- Durable Cylinder: Constructed from high-grade cast aluminium for exceptional strength and longevity.\n \n- Advanced Piston: Features a forged aluminium piston with a molybdenum Teflon-coated skirt to significantly reduce friction and wear, extending the life of your engine components.\n \n- Enhanced Heat Resistance: The piston dome is anodized for superior heat dissipation and increased durability under demanding conditions.\n \n- Reliable Gaskets: Includes performance gaskets engineered for enhanced durability and a reliable seal.\n \n- Complete Rebuild: This comprehensive kit includes the piston, rings, pin, clips, and a full top-end gasket set, making for a convenient and thorough rebuild.\n\n**Specifications:**\n\n \n- Cylinder Bore: 71.00mm\n \n- Cylinder Stroke: 58.00mm\n \n- Cylinder Material: High-grade cast aluminium\n \n- Piston Material: Forged aluminium","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"YFM 250 Bear Tracker","cc":null,"notes":null,"years":"1999–2004"}],"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-top-end-kit-yamaha-1989-2004-bear-tracker-250-oem-spec-replacement","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/a9a67ef4ccf6:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/a9a67ef4ccf6:1"}},"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."]}}