{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"4cfc90a543e3","name":"PISTON KIT 04-05 CRF250R 78.00, FORGED WOSSNER 8587DA, 13101-KRN-670","sku":"56-W4829.A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":182.86,"formatted":"£182.86"},"summary":"Wossner 78.00mm forged piston kit is designed for strength and durability. Engineered for optimal heat transfer, it ensures efficient cooling of the combustion chamber. The elliptical design provides a uniform bearing surface, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany for precision and reliability. Features include forged construction for enhanced strength and longevity, optimized heat transfer for improved engine performance, and an elliptical design that prevents piston collapse and ensures even load distribution. Manufactured in Germany for high-quality standards. Specifications: Bore Size 78.00mm, Actual Bore Diameter 77.95mm, Displacement 249 cm&sup3;, Stroke 52.20mm, Clearance 0.05mm, Wossner Compression Ratio OEM, OEM Compression Ratio 12.90:1, Dome Volume -1.00 cm&sup3;, Compression Height 18.90mm, Gasket Part Number D4004, Lock Part Number CW16, Pin Part Number WP070, Ring Set Part Number 780XAS-2, Rod Part Number P4001. Cross-Reference OEM Part Numbers: 13101-KRN-670. Part No: 56-W4829.A.WO. Wossner Part No: 8587DA.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"78mm"},{"label":"Variant Id","value":"256197"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4829_2EA_2EWO/875d9df026c96feb.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4829_2EA_2EWO/875d9df026c96feb.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4829_2EA_2EWO/530a4015a7eb20ab.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4829_2EA_2EWO/6d8ddc146a497279.jpg"],"description":"Wossner 78.00mm forged piston kit is designed for strength and durability. Engineered for optimal heat transfer, it ensures efficient cooling of the combustion chamber. The elliptical design provides a uniform bearing surface, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany for precision and reliability. Features include forged construction for enhanced strength and longevity, optimized heat transfer for improved engine performance, and an elliptical design that prevents piston collapse and ensures even load distribution. Manufactured in Germany for high-quality standards. Specifications: Bore Size 78.00mm, Actual Bore Diameter 77.95mm, Displacement 249 cm&sup3;, Stroke 52.20mm, Clearance 0.05mm, Wossner Compression Ratio OEM, OEM Compression Ratio 12.90:1, Dome Volume -1.00 cm&sup3;, Compression Height 18.90mm, Gasket Part Number D4004, Lock Part Number CW16, Pin Part Number WP070, Ring Set Part Number 780XAS-2, Rod Part Number P4001. Cross-Reference OEM Part Numbers: 13101-KRN-670. Part No: 56-W4829.A.WO. Wossner Part No: 8587DA.","descriptionMarkdown":"### Wossner 78.00mm Forged Piston Kit\n\nThis Wossner 78.00mm forged piston kit is engineered for superior strength and exceptional durability, providing a significant upgrade for your engine. Designed with optimal heat transfer in mind, it ensures efficient cooling of the combustion chamber, leading to improved performance and longevity. The advanced elliptical design of the piston offers a uniform bearing surface, effectively reducing localized pressure and distributing thrust loads evenly. This intelligent design prevents piston collapse and maintains optimal operational integrity.\n\nManufactured in Germany to stringent quality standards, this Wossner piston kit represents precision engineering and reliability.\n\n#### Key Features\n\n \n- Forged Construction: Built for enhanced strength and extended lifespan, offering superior resistance to stress and wear.\n \n- Optimized Heat Transfer: Promotes efficient cooling within the combustion chamber, contributing to better engine performance and durability.\n \n- Elliptical Design: Prevents piston collapse by ensuring an even distribution of load and thrust, maintaining optimal bearing surfaces.\n \n- German Manufacturing: Guarantees high-quality standards, precision, and reliability in every component.\n\n#### Specifications\n\n \n- Bore Size: 78.00mm\n \n- Actual Bore Diameter: 77.95mm\n \n- Displacement: 249 cm&sup3;\n \n- Stroke: 52.20mm\n \n- Clearance: 0.05mm\n \n- Wossner Compression Ratio: OEM\n \n- OEM Compression Ratio: 12.90:1\n \n- Dome Volume: -1.00 cm&sup3;\n \n- Compression Height: 18.90mm\n \n- Gasket Part Number: D4004\n \n- Lock Part Number: CW16\n \n- Pin Part Number: WP070\n \n- Ring Set Part Number: 780XAS-2\n \n- Rod Part Number: P4001\n\n**Cross-Reference OEM Part Numbers:**\n\n \n- 13101-KRN-670","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-04-05-crf250r-7800-forged-wossner-8587da-13101-krn-670","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/4cfc90a543e3:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/4cfc90a543e3:1"}},"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."]}}