{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"3996eced0e9c","name":"PISTON KIT YZF WRF 250 2-RING, WOSSNER 8713DB 08-13 77mm","sku":"56-W241+00B.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 77.01mm bore and 76.97mm diameter. 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, and increased compression ratio. Specifications: Bore 77.01mm, Diameter 76.97mm, 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# 8713DB), Lock P/N: CW16, Pin P/N: WP059, Ring Set P/N: 770XAS, Rod P/N: P4005.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"255160"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00B_2EWO/ba35fc6dc9e2e602.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00B_2EWO/ba35fc6dc9e2e602.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00B_2EWO/c24d1c34ab7097b6.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00B_2EWO/30cf69e03098de95.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W241_2B00B_2EWO/e0a14c8fcbf665f0.jpg"],"description":"Wossner forged piston kit with a 77.01mm bore and 76.97mm diameter. 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, and increased compression ratio. Specifications: Bore 77.01mm, Diameter 76.97mm, 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# 8713DB), Lock P/N: CW16, Pin P/N: WP059, Ring Set P/N: 770XAS, Rod P/N: P4005.","descriptionMarkdown":"### Wossner Forged Piston Kit 77.01mm - High Performance Upgrade\n\nEnhance the performance of your motorcycle with the Wossner Forged Piston Kit. This premium piston is precision engineered for demanding applications, offering superior strength and durability. Manufactured in Germany, this kit is designed to optimize your engine's power output and efficiency.\n\n#### Key Features:\n\n\t\n- Forged Construction: Provides exceptional strength and resistance to extreme pressures and temperatures.\n\t\n- Optimized Heat Transfer: Designed to efficiently transfer heat to the cylinder walls, promoting consistent performance and longevity.\n\t\n- Elliptical Design: Ensures uniform load distribution across the piston surface, even under high heat, preventing localized stress and potential piston collapse.\n\t\n- 2-Ring Piston: Engineered for performance applications, contributing to improved sealing and power delivery.\n\t\n- Increased Compression Ratio: Features a higher compression ratio (14.10:1) compared to OEM (13.50:1) for a noticeable boost in power.\n\t\n- German Engineering: Manufactured to the highest standards in Germany, guaranteeing quality and reliability.\n\n#### Specifications:\n\n\t\n- Bore Size: 77.01mm\n\t\n- Piston Diameter: 76.97mm\n\t\n- Engine Displacement: 249 cm&sup3;\n\t\n- Stroke: 53.60mm\n\t\n- Piston to Cylinder 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","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-8713db-08-13-77mm","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/3996eced0e9c:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/3996eced0e9c: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."]}}