{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"3c7882b55b88","name":"PISTON KIT 06-09 CRF250R X 78, FORGED WOSSNER 8656DA, 13101-KRN-850","sku":"56-W4830+00A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":3,"price":{"amount":182.86,"formatted":"£182.86"},"summary":"Wossner 78.00mm forged piston kit designed for enhanced engine performance. Features a high-compression design and forged construction for strength and longevity. Optimized heat transfer ensures efficient cooling, while the elliptical design prevents piston collapse and distributes thrust loads evenly. Manufactured in Germany. Bore Size: 78.00mm. Actual Bore Diameter: 77.96mm. Displacement: 249 cm³. Stroke: 52.20mm. Clearance: 0.04mm. Wossner Compression Ratio: 13.50:1. OEM Compression Ratio: 12.90:1. Dome Volume: -0.90 cm³. Compression Height: 24.00mm. Theoretical Weight: 19.00g. Gasket Part Number: D4004. Lock Part Number: CW16. Pin Part Number: WP059. Ring Set Part Number: 780XAS. Cross-Reference OEM Part Numbers: 13101-KRN-850. Part No: 56-W4830+00A.WO. Wossner Part No: 8656DA.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"78mm"},{"label":"Variant Id","value":"256212"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4830_2B00A_2EWO/412d448f1e1b87d5.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4830_2B00A_2EWO/412d448f1e1b87d5.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4830_2B00A_2EWO/980e34bb376f33b0.jpg"],"description":"Wossner 78.00mm forged piston kit designed for enhanced engine performance. Features a high-compression design and forged construction for strength and longevity. Optimized heat transfer ensures efficient cooling, while the elliptical design prevents piston collapse and distributes thrust loads evenly. Manufactured in Germany. Bore Size: 78.00mm. Actual Bore Diameter: 77.96mm. Displacement: 249 cm³. Stroke: 52.20mm. Clearance: 0.04mm. Wossner Compression Ratio: 13.50:1. OEM Compression Ratio: 12.90:1. Dome Volume: -0.90 cm³. Compression Height: 24.00mm. Theoretical Weight: 19.00g. Gasket Part Number: D4004. Lock Part Number: CW16. Pin Part Number: WP059. Ring Set Part Number: 780XAS. Cross-Reference OEM Part Numbers: 13101-KRN-850. Part No: 56-W4830+00A.WO. Wossner Part No: 8656DA.","descriptionMarkdown":"### Wossner 78.00mm Forged High-Compression Piston Kit\n\nEnhance your engine's performance with the Wossner 78.00mm high-compression forged piston kit. Engineered in Germany, this piston is designed for optimal heat transfer, ensuring efficient cooling of the combustion chamber. Its advanced elliptical design creates a uniform bearing surface, which reduces localized pressure and distributes thrust loads evenly. This prevents piston collapse and contributes to greater engine longevity.\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 combustion chamber cooling\n\t\n- Elliptical piston shape for even load distribution and prevention of collapse\n\t\n- Precision manufactured in Germany\n\n**Specifications:**\n\n\t\n- Bore Size: 78.00mm\n\t\n- Actual Bore Diameter: 77.96mm\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: 13.50:1\n\t\n- OEM Compression Ratio: 12.90:1\n\t\n- Dome Volume: -0.90 cm&sup3;\n\t\n- Compression Height: 24.00mm\n\t\n- Theoretical Weight: 19.00g\n\n**Included Components:**\n\n\t\n- Gasket Part Number: D4004\n\t\n- Lock Part Number: CW16\n\t\n- Pin Part Number: WP059\n\t\n- Ring Set Part Number: 780XAS\n\n**Cross-Reference OEM Part Numbers:**\n\n\t\n- 13101-KRN-850\n\t\n- Wossner Part Number: 8656DA","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-06-09-crf250r-x-78-forged-wossner-8656da-13101-krn-850","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/3c7882b55b88:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/3c7882b55b88:1"}},"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."]}}