{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"3a74a1b5d706","name":"PISTON KIT XR XL 250 74.00, FORGED WOSSNER 8791DA 79-83","sku":"56-W4171+P0.A","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":172.51,"formatted":"£172.51"},"summary":"Wossner forged piston kit with a bore size of 74.00 mm. Manufactured in Germany, this piston offers superior strength and heat transfer efficiency. The elliptical design ensures even load distribution, reducing localized pressure and preventing piston collapse. Features forged construction for enhanced durability and strength, optimized heat transfer for improved performance, and an elliptical design for uniform bearing surface and reduced wear. Designed for 4-stroke engines. Specifications include an actual bore of 73.94 mm, stroke of 57.80 mm, clearance of 0.06 mm, compression height of 24.70 mm, dome volume of +9.30 cm&sup3;, a compression ratio of 10.00:1 (OEM: 9.10:1), and displacement of 249 cm&sup3;. Wossner part number 8791DA. Lock P/N: CW19, Pin P/N: WP028, Ring Set P/N: 740XDS. Weight is 318 grams.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"74mm"},{"label":"Variant Id","value":"255542"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock54488_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock54488_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54488_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54488_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54488_4.jpg"],"description":"Wossner forged piston kit with a bore size of 74.00 mm. Manufactured in Germany, this piston offers superior strength and heat transfer efficiency. The elliptical design ensures even load distribution, reducing localized pressure and preventing piston collapse. Features forged construction for enhanced durability and strength, optimized heat transfer for improved performance, and an elliptical design for uniform bearing surface and reduced wear. Designed for 4-stroke engines. Specifications include an actual bore of 73.94 mm, stroke of 57.80 mm, clearance of 0.06 mm, compression height of 24.70 mm, dome volume of +9.30 cm&sup3;, a compression ratio of 10.00:1 (OEM: 9.10:1), and displacement of 249 cm&sup3;. Wossner part number 8791DA. Lock P/N: CW19, Pin P/N: WP028, Ring Set P/N: 740XDS. Weight is 318 grams.","descriptionMarkdown":"### Wossner Forged Piston Kit for Honda XR/XL 250\n\nEnhance the performance and durability of your motorcycle with this Wossner Forged Piston Kit. Expertly crafted in Germany, this piston is engineered for superior strength and efficient heat transfer, ensuring optimal engine function. Its advanced elliptical design promotes even load distribution, effectively reducing localized pressure and preventing piston collapse for a longer lifespan.\n\n#### Key Features\n\n\t\n- Forged construction for exceptional durability and strength\n\t\n- Optimized for superior heat transfer, leading to improved engine performance\n\t\n- Elliptical design ensures a uniform bearing surface, minimizing wear\n\t\n- Specifically designed for 4-stroke engines\n\n#### Specifications\n\n\t\n- Bore Size: 74.00 mm\n\t\n- Actual Bore: 73.94 mm\n\t\n- Stroke: 57.80 mm\n\t\n- Clearance: 0.06 mm\n\t\n- Compression Height: 24.70 mm\n\t\n- Dome Volume: +9.30 cm&sup3;\n\t\n- Compression Ratio: 10.00:1 (Compared to OEM 9.10:1)\n\t\n- Displacement: 249 cm&sup3;\n\t\n- Manufacturing Origin: Germany\n\n#### Component Part Numbers\n\n\t\n- Wossner Piston Part Number: 8791DA\n\t\n- Lock Ring Part Number: CW19\n\t\n- Pin Part Number: WP028\n\t\n- Ring Set Part Number: 740XDS","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-xr-xl-250-7400-forged-wossner-8791da-79-83","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/3a74a1b5d706:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/3a74a1b5d706:1"}},"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."]}}