{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"d919f20a250f","name":"PISTON KIT 04-09 CRF250 HC 78, WOSSNER 8590DB FORGED","sku":"56-W4852.B.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":182.86,"formatted":"£182.86"},"summary":"Wossner 78.01mm high-compression forged piston kit engineered for enhanced engine performance. The piston features an elliptical design for uniform bearing surface, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Optimized heat transfer ensures efficient cooling of the combustion chamber. Manufactured in Germany for precision and reliability. Features include high-compression design, forged construction for strength and longevity, optimized heat transfer, and elliptical design. Specifications: Bore Size 78.01mm, Actual Bore Diameter 77.97mm, Displacement 249 cm&sup3;, Stroke 52.20mm, Clearance 0.04mm, Wossner Compression Ratio 13.90:1, OEM Compression Ratio 12.90:1, Dome Volume +0.00 cm&sup3;, Compression Height 19.00mm, Lock Part Number CW16, Pin Part Number WP059, Ring Set Part Number 780XAS, Rod Part Number P4001. Cross-reference OEM Part Numbers: 56-W4852.B.WO. Wossner Part No: 8590DB. Weight 240g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"78mm"},{"label":"Variant Id","value":"256272"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock55218_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock55218_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock55218_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock55218_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock55218_4.jpg"],"description":"Wossner 78.01mm high-compression forged piston kit engineered for enhanced engine performance. The piston features an elliptical design for uniform bearing surface, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Optimized heat transfer ensures efficient cooling of the combustion chamber. Manufactured in Germany for precision and reliability. Features include high-compression design, forged construction for strength and longevity, optimized heat transfer, and elliptical design. Specifications: Bore Size 78.01mm, Actual Bore Diameter 77.97mm, Displacement 249 cm&sup3;, Stroke 52.20mm, Clearance 0.04mm, Wossner Compression Ratio 13.90:1, OEM Compression Ratio 12.90:1, Dome Volume +0.00 cm&sup3;, Compression Height 19.00mm, Lock Part Number CW16, Pin Part Number WP059, Ring Set Part Number 780XAS, Rod Part Number P4001. Cross-reference OEM Part Numbers: 56-W4852.B.WO. Wossner Part No: 8590DB. Weight 240g.","descriptionMarkdown":"### Wossner 78.01mm High-Compression Forged Piston Kit\n\nEnhance your engine's performance with this Wossner high-compression forged piston kit. Engineered for optimal heat transfer, this piston ensures efficient cooling of the combustion chamber. Its unique elliptical design promotes uniform bearing surface, minimizing localized pressure and distributing thrust loads evenly to prevent piston collapse. Precision manufactured in Germany for superior quality and reliability.\n\n**Key Features:**\n\n\t\n- High-compression design for increased engine power\n\t\n- Forged construction for superior strength and durability\n\t\n- Optimized heat transfer for effective cooling\n\t\n- Elliptical shape prevents piston collapse and ensures even load distribution\n\t\n- German manufacturing ensures high-quality standards\n\n**Specifications:**\n\n\t\n- Bore Size: 78.01mm\n\t\n- Actual Bore Diameter: 77.97mm\n\t\n- Displacement: 249 cm&sup3;\n\t\n- Stroke: 52.20mm\n\t\n- Clearance: 0.04mm\n\t\n- Wossner Compression Ratio: 13.90:1\n\t\n- OEM Compression Ratio: 12.90:1\n\t\n- Dome Volume: +0.00 cm&sup3;\n\t\n- Compression Height: 19.00mm\n\t\n- Lock Part Number: CW16\n\t\n- Pin Part Number: WP059\n\t\n- Ring Set Part Number: 780XAS\n\t\n- Rod Part Number: P4001 (2010 - Current)\n\n**Cross-Reference OEM Part Numbers:**\n\n\t\n- Wossner Part No: 8590DB","weightGrams":null,"fitments":[{"make":"HONDA","model":"CRF 250R","cc":null,"notes":null,"years":"2004–2009"},{"make":"HONDA","model":"CRF 250X","cc":null,"notes":null,"years":"2004–2017"}],"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-04-09-crf250-hc-78-wossner-8590db-forged","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/d919f20a250f:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/d919f20a250f: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."]}}