{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"c303b9392e72","name":"PISTON KIT 15-16 KX250F 77 B, 8921DB WOSSNER KAWASAKI, KXF250","sku":"56-W331.B.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":172.14,"formatted":"£172.14"},"summary":"Wossner forged piston kit with a 77.01mm bore. Features forged construction for increased strength and reliability, optimized heat transfer for efficient combustion, and an elliptical design for uniform bearing surface and even thrust load distribution. Manufactured in Germany. Specifications include a 77.01mm bore size, 0.05mm clearance, OEM compression ratio of 13.80:1, -2.43 cm&sup3; dome volume, 19.80mm compression height, 53.60mm stroke, 249 cm&sup3; displacement, and a theoretical weight of 139.00g. Wossner Part No: 8921DB. Lock Part No: CW16. Pin Part No: WP087. Ring Set Part No: 770XAS-2.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77mm"},{"label":"Variant Id","value":"255325"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock54271_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock54271_1.jpg"],"description":"Wossner forged piston kit with a 77.01mm bore. Features forged construction for increased strength and reliability, optimized heat transfer for efficient combustion, and an elliptical design for uniform bearing surface and even thrust load distribution. Manufactured in Germany. Specifications include a 77.01mm bore size, 0.05mm clearance, OEM compression ratio of 13.80:1, -2.43 cm&sup3; dome volume, 19.80mm compression height, 53.60mm stroke, 249 cm&sup3; displacement, and a theoretical weight of 139.00g. Wossner Part No: 8921DB. Lock Part No: CW16. Pin Part No: WP087. Ring Set Part No: 770XAS-2.","descriptionMarkdown":"### Wossner Forged Piston Kit - 77.01mm Bore\n\nUpgrade your motorcycle's performance and durability with this Wossner forged piston kit. Engineered for precision and strength, this piston kit is designed to enhance combustion efficiency and withstand high operating temperatures. The advanced elliptical design ensures even distribution of bearing surface pressure, preventing localized stress and piston distortion even under extreme heat. Manufactured with exceptional quality standards in Germany, Wossner pistons are trusted by performance enthusiasts worldwide.\n\n**Key Features:**\n\n\t\n- Forged Construction: Provides superior strength and reliability compared to cast pistons, essential for high-performance applications.\n\t\n- Optimized Heat Transfer: Promotes efficient combustion and helps manage engine temperatures.\n\t\n- Elliptical Design: Ensures uniform bearing surface expansion and even thrust load distribution, reducing wear and preventing collapse under heat.\n\t\n- German Engineering: Manufactured in Germany, guaranteeing high quality and performance.\n\n**Specifications:**\n\n\t\n- Bore Size: 77.01mm\n\t\n- Clearance: 0.05mm\n\t\n- Compression Ratio (Wossner): OEM\n\t\n- OEM Compression Ratio: 13.80:1\n\t\n- Dome Volume: -2.43 cm&sup3;\n\t\n- Compression Height: 19.80mm\n\t\n- Stroke: 53.60mm\n\t\n- Displacement: 249 cm&sup3;\n\t\n- Theoretical Weight: 139.00g\n\n**Included Components:**\n\n\t\n- Piston\n\t\n- Lock Ring Part Number: CW16\n\t\n- Pin Part Number: WP087\n\t\n- Ring Set Part Number: 770XAS-2","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"KX 250F","cc":null,"notes":null,"years":"2015–2016"}],"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-15-16-kx250f-77-b-8921db-wossner-kawasaki-kxf250","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/c303b9392e72:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/c303b9392e72:1"}},"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."]}}