{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"eba7833f0238","name":"PISTON KIT 01-04 YZF250 77.00, 8572DA WOSSNER 2-RING, 5NL-11631-10-00","sku":"56-W022+00A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":172.51,"formatted":"£172.51"},"summary":"Wossner Pro Series forged piston kit with a two-ring configuration. Engineered for optimal heat transfer and superior strength. Features an elliptical design for uniform bearing surface under heat expansion, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany. Bore: 76.96 mm, Piston Size: 77.00 mm, Displacement: 249 cm³, Stroke: 53.60 mm, Clearance: 0.04 mm, Wossner Compression Ratio: 12.80:1, OEM Compression Ratio: 12.50:1, Dome Volume: -4.80 cm³, Compression Height: 20.50 mm. Cross-reference OEM Part Number: 5NL-11631-10-00. Lock: CW16, Pin: WP059, Ring Set: 770XAS, Rod: P4006 / P4005.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"254284"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W022_2B00A_2EWO/42121986312c0624.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W022_2B00A_2EWO/42121986312c0624.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W022_2B00A_2EWO/db69ad4bd98bff0c.jpg"],"description":"Wossner Pro Series forged piston kit with a two-ring configuration. Engineered for optimal heat transfer and superior strength. Features an elliptical design for uniform bearing surface under heat expansion, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany. Bore: 76.96 mm, Piston Size: 77.00 mm, Displacement: 249 cm³, Stroke: 53.60 mm, Clearance: 0.04 mm, Wossner Compression Ratio: 12.80:1, OEM Compression Ratio: 12.50:1, Dome Volume: -4.80 cm³, Compression Height: 20.50 mm. Cross-reference OEM Part Number: 5NL-11631-10-00. Lock: CW16, Pin: WP059, Ring Set: 770XAS, Rod: P4006 / P4005.","descriptionMarkdown":"### Wossner 2-Ring Forged Piston Kit - Pro Series\n\nElevate your engine's performance and durability with this Wossner Pro Series forged piston kit. Engineered in Germany, this piston is crafted for superior strength and optimal heat management, ensuring reliable power delivery and extended engine life.\n\nThe advanced forged construction provides exceptional resistance to high temperatures and pressures commonly found in demanding performance applications. Wossner's innovative elliptical design is a key feature, ensuring a uniform bearing surface even under extreme heat expansion. This intelligent design minimizes localized pressure points and distributes thrust loads evenly, effectively preventing piston collapse and reducing wear.\n\nDesigned with a two-ring configuration, this piston kit offers enhanced sealing capabilities for improved compression and reduced blow-by, contributing to both longevity and performance.\n\n**Key Features:**\n\n\t\n- Forged construction for superior strength and durability\n\t\n- Engineered for optimized heat transfer from the combustion chamber\n\t\n- Elliptical design ensures uniform bearing surface under heat expansion\n\t\n- Reduces localized pressure and distributes thrust loads evenly to prevent piston collapse\n\t\n- Pro Series design with a two-ring configuration for enhanced sealing and longevity\n\t\n- Manufactured in Germany\n\n**Specifications:**\n\n\t\n- Bore: 76.96 mm\n\t\n- Piston Size: 77.00 mm\n\t\n- Displacement: 249 cm&sup3;\n\t\n- Stroke: 53.60 mm\n\t\n- Clearance: 0.04 mm\n\t\n- Wossner Compression Ratio: 12.80:1\n\t\n- OEM Compression Ratio: 12.50:1\n\t\n- Dome Volume: -4.80 cm&sup3;\n\t\n- Compression Height: 20.50 mm\n\n**Included Components:**\n\n\t\n- Lock: CW16\n\t\n- Pin: WP059\n\t\n- Ring Set: 770XAS\n\t\n- Rod: P4006 / P4005\n\n**Replaces OEM Part Number:** 5NL-11631-10-00","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-01-04-yzf250-7700-8572da-wossner-2-ring-5nl-11631-10-00","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/eba7833f0238:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/eba7833f0238:1"}},"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."]}}