{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"de0fde42ed4d","name":"PISTON KIT YZF WRF 250 2-RING, WOSSNER 8713DA 08-13 77mm, 5XC-11631-00-00","sku":"56-W241+00A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":3,"price":{"amount":182.4,"formatted":"£182.40"},"summary":"Wossner forged piston kit with a 77.00mm bore and 76.96mm diameter, designed for Yamaha YZ250F and WR250F models. This 2-ring piston is engineered for high performance, featuring superior strength and design. Manufactured in Germany, it ensures optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Features include forged construction, optimized heat transfer, elliptical design for uniform load distribution, 2-ring piston design, increased compression ratio, and German manufacturing. Specifications: Bore 77.00mm, Diameter 76.96mm, Display 249 cm³, Stroke 53.60mm, Clearance 0.04mm, Wossner Compression Ratio 14.10:1, OEM Compression Ratio 13.50:1, Dome Volume -5.00 cm³, Compression Height 22.50mm. Cross-reference OEM Part Numbers: Wossner Piston Yamaha YZ250F (PN# 8713DA), Lock P/N: CW16, Pin P/N: WP059, Ring Set P/N: 770XAS-2, Rod P/N: P4005, OEM Reference: 5XC-11631-00-00.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"255159"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00A_2EWO/ba35fc6dc9e2e602.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00A_2EWO/ba35fc6dc9e2e602.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00A_2EWO/c24d1c34ab7097b6.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00A_2EWO/30cf69e03098de95.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00A_2EWO/e0a14c8fcbf665f0.jpg"],"description":"Wossner forged piston kit with a 77.00mm bore and 76.96mm diameter, designed for Yamaha YZ250F and WR250F models. This 2-ring piston is engineered for high performance, featuring superior strength and design. Manufactured in Germany, it ensures optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Features include forged construction, optimized heat transfer, elliptical design for uniform load distribution, 2-ring piston design, increased compression ratio, and German manufacturing. Specifications: Bore 77.00mm, Diameter 76.96mm, Display 249 cm³, Stroke 53.60mm, Clearance 0.04mm, Wossner Compression Ratio 14.10:1, OEM Compression Ratio 13.50:1, Dome Volume -5.00 cm³, Compression Height 22.50mm. Cross-reference OEM Part Numbers: Wossner Piston Yamaha YZ250F (PN# 8713DA), Lock P/N: CW16, Pin P/N: WP059, Ring Set P/N: 770XAS-2, Rod P/N: P4005, OEM Reference: 5XC-11631-00-00.","descriptionMarkdown":"### Wossner 2-Ring Forged Piston Kit for Yamaha YZ250F and WR250F\n\nEnhance your motorcycle's performance with this Wossner forged piston kit. Engineered for precision and durability, this kit features a 77.00mm bore and a 76.96mm diameter, designed to optimize power output for high-performance applications. Manufactured in Germany, Wossner pistons are known for their superior strength and advanced design.\n\nThe 2-ring piston design contributes to improved efficiency and power delivery. Its innovative elliptical shape ensures a uniform bearing surface, even under extreme heat, which reduces localized pressure and evenly distributes thrust loads. This prevents piston collapse and promotes longevity. The piston also facilitates optimal heat transfer to the cylinder walls, contributing to efficient combustion and improved engine performance.\n\n**Key Features:**\n\n\t\n- Forged construction for exceptional strength and reliability.\n\t\n- Optimized heat transfer for enhanced combustion efficiency.\n\t\n- Elliptical piston design for uniform load distribution and reduced wear.\n\t\n- 2-ring configuration tailored for performance needs.\n\t\n- Increased compression ratio for a noticeable boost in power.\n\t\n- Precision manufactured in Germany.\n\n**Specifications:**\n\n\t\n- Bore: 77.00mm\n\t\n- Diameter: 76.96mm\n\t\n- Displacement: 249 cm&sup3;\n\t\n- Stroke: 53.60mm\n\t\n- Clearance: 0.04mm\n\t\n- Wossner Compression Ratio: 14.10:1\n\t\n- OEM Compression Ratio: 13.50:1\n\t\n- Dome Volume: -5.00 cm&sup3;\n\t\n- Compression Height: 22.50mm\n\n**Included Components:**\n\n\t\n- Piston\n\t\n- Lock Ring (Part # CW16)\n\t\n- Pin (Part # WP059)\n\t\n- Ring Set (Part # 770XAS-2)\n\n**Cross-Reference OEM Part Numbers:**\n\n\t\n- Wossner Piston Yamaha YZ250F (PN# 8713DA)\n\t\n- OEM Reference: 5XC-11631-00-00","weightGrams":null,"fitments":[],"collections":[{"name":"Engine","url":"https://www.2brosparts.com/api/agent/collection/GB/engine"},{"name":"Pistons & Kits","url":"https://www.2brosparts.com/api/agent/collection/GB/pistons-kits"}],"links":{"page":"https://www.2brosparts.com/products/piston-kit-yzf-wrf-250-2-ring-wossner-8713da-08-13-77mm-5xc-11631-00-00","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/de0fde42ed4d:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/de0fde42ed4d: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."]}}