{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"3dd5414fa7fb","name":"PISTON KIT 08-12 WR250X 77.00, COMP. 13.5:1 WOSSNER 8729DB","sku":"56-W238+00B.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":182.4,"formatted":"£182.40"},"summary":"Wossner forged piston kit with a 77.01mm bore and 76.97mm diameter. This piston offers superior strength and design, ensuring 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, and an elliptical design for uniform load distribution. Manufactured in Germany. Specifications: Bore 77.01mm, Diameter 76.97mm, Display (cm³) 249, Stroke (mm) 53.60, Clearance (mm) 0.04, Wossner Compression Ratio OEM, OEM Compression Ratio 11.80:1, Dome Volume (cm³) -5.90, Compression Height (mm) 22.90. Cross-Reference OEM Part Numbers: Wossner Piston Yamaha WR250X (PN# 8729DB), 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":"255148"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W238_2B00B_2EWO/47a6cabc2311fa5f.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W238_2B00B_2EWO/47a6cabc2311fa5f.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W238_2B00B_2EWO/9893bcc0445b670b.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W238_2B00B_2EWO/27d8b85c7057b453.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W238_2B00B_2EWO/1eaf4492f742ce80.jpg"],"description":"Wossner forged piston kit with a 77.01mm bore and 76.97mm diameter. This piston offers superior strength and design, ensuring 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, and an elliptical design for uniform load distribution. Manufactured in Germany. Specifications: Bore 77.01mm, Diameter 76.97mm, Display (cm³) 249, Stroke (mm) 53.60, Clearance (mm) 0.04, Wossner Compression Ratio OEM, OEM Compression Ratio 11.80:1, Dome Volume (cm³) -5.90, Compression Height (mm) 22.90. Cross-Reference OEM Part Numbers: Wossner Piston Yamaha WR250X (PN# 8729DB), Lock P/N: CW17, Pin P/N: WP083, Ring Set P/N: 770XAS-2.","descriptionMarkdown":"### Wossner Forged Piston Kit for Yamaha WR250X\n\nUpgrade your Yamaha WR250X with this high-performance forged piston kit from Wossner. Manufactured with precision in Germany, this piston is engineered for superior strength and optimal engine performance. Its advanced design ensures efficient heat transfer to the cylinder walls, promoting better combustion and longevity. The unique elliptical shape of the piston provides a consistent bearing surface, even under extreme heat expansion, effectively distributing thrust loads and preventing piston collapse for a smoother, more reliable ride.\n\n#### Key Features:\n\n\t\n- Forged construction for exceptional durability and strength.\n\t\n- Designed for optimal heat transfer, enhancing combustion efficiency.\n\t\n- Features an elliptical design that ensures uniform load distribution under heat.\n\t\n- Precisely manufactured in Germany for quality assurance.\n\t\n- Reduces localized pressure and evenly distributes thrust loads to prevent piston collapse.\n\n#### Specifications:\n\n\t\n- Bore: 77.01mm\n\t\n- Diameter: 76.97mm\n\t\n- Display (cm&sup3;): 249\n\t\n- Stroke (mm): 53.60\n\t\n- Clearance (mm): 0.04\n\t\n- Compression Height (mm): 22.90\n\t\n- Dome Volume (cm&sup3;): -5.90\n\n**Included Components:**\n\n\t\n- Wossner Piston (Part Number: 8729DB)\n\t\n- Lock Ring (Part Number: CW17)\n\t\n- Piston Pin (Part Number: WP083)\n\t\n- Ring Set (Part Number: 770XAS-2)","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-08-12-wr250x-7700-comp-1351-wossner-8729db","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/3dd5414fa7fb:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/3dd5414fa7fb: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."]}}