{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"e4d2560cc328","name":"PISTON KIT 08-09 WR250X 77 HC, FORGED WOSSNER 8772DB","sku":"56-W239.B.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":146.8,"formatted":"£146.80"},"summary":"Wossner forged piston kit with a 77.01mm bore and 76.97mm diameter. This Pro Series 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 for superior strength, optimized heat transfer for efficient combustion, elliptical design for uniform load distribution, and high compression ratio for increased performance. Specifications: Bore: 77.01mm, Diameter: 76.97mm, Display (cm&sup3;): 249, Stroke (mm): 53.60, Clearance (mm): 0.04, Wossner Compression Ratio: 13.50:1, OEM Compression Ratio: 11.80:1, Dome Volume (cm&sup3;): -4.50, Compression Height (mm): 22.20. Cross-Reference OEM Part Numbers: Wossner Piston Yamaha WR250X (PN# 8772DB), Lock P/N: CW17, Pin P/N: WP083, Ring Set P/N: 770XAS-2.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77mm"},{"label":"Variant Id","value":"255152"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W239_2EB_2EWO/1ff6aa3a7971d3fb.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W239_2EB_2EWO/1ff6aa3a7971d3fb.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W239_2EB_2EWO/bd6d8fe7a9c2c43f.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W239_2EB_2EWO/1f7b9101381da544.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W239_2EB_2EWO/112b15c6a74f8d2a.jpg"],"description":"Wossner forged piston kit with a 77.01mm bore and 76.97mm diameter. This Pro Series 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 for superior strength, optimized heat transfer for efficient combustion, elliptical design for uniform load distribution, and high compression ratio for increased performance. Specifications: Bore: 77.01mm, Diameter: 76.97mm, Display (cm&sup3;): 249, Stroke (mm): 53.60, Clearance (mm): 0.04, Wossner Compression Ratio: 13.50:1, OEM Compression Ratio: 11.80:1, Dome Volume (cm&sup3;): -4.50, Compression Height (mm): 22.20. Cross-Reference OEM Part Numbers: Wossner Piston Yamaha WR250X (PN# 8772DB), Lock P/N: CW17, Pin P/N: WP083, Ring Set P/N: 770XAS-2.","descriptionMarkdown":"### Wossner 77mm Forged Piston Kit for WR250X\n\nEnhance the performance of your motorcycle with this Wossner Pro Series forged piston kit. Engineered in Germany, this high-performance piston boasts superior strength and advanced design for optimal engine operation.\n\nThe piston features an elliptical design that ensures a uniform bearing surface even under the extreme conditions of heat expansion. This innovative design minimizes localized pressure and evenly distributes thrust loads, effectively preventing piston collapse and extending engine life.\n\n**Key Features:**\n\n\t\n- Forged construction for exceptional durability and strength.\n\t\n- Designed for optimal heat transfer to the cylinder walls, promoting efficient combustion.\n\t\n- Elliptical piston shape for uniform load distribution under thermal stress.\n\t\n- Achieves a high compression ratio for a significant boost in performance.\n\t\n- Precision manufactured in Germany to exacting standards.\n\n**Specifications:**\n\n\t\n- Bore: 77.01mm\n\t\n- Diameter: 76.97mm\n\t\n- Display (cm³): 249\n\t\n- Stroke (mm): 53.60\n\t\n- Clearance (mm): 0.04\n\t\n- Wossner Compression Ratio: 13.50:1\n\t\n- OEM Compression Ratio: 11.80:1\n\t\n- Dome Volume (cm³): -4.50\n\t\n- Compression Height (mm): 22.20","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"WR X 250","cc":null,"notes":null,"years":"2008–2012"}],"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-08-09-wr250x-77-hc-forged-wossner-8772db","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/e4d2560cc328:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/e4d2560cc328:1"}},"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."]}}