{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"e6b63b61e6dd","name":"PISTON KIT 15-16 KX250F 77 HC, HIGH COMPRESSION, WOSSNER 8922DB KXF250","sku":"56-W331.B.WO.HC","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":172.51,"formatted":"£172.51"},"summary":"Wossner high-compression forged piston kit with a 77.01mm bore. Engineered for increased performance, the elliptical design ensures uniform bearing surface expansion, reducing localized pressure and preventing piston collapse. Manufactured in Germany for strength, durability, and efficient heat transfer. Features include high-compression design for enhanced performance, forged construction for increased strength and reliability, optimized heat transfer for efficient combustion, elliptical design for uniform bearing surface and even thrust load distribution, and is manufactured in Germany. Specifications: Bore Size 77.01mm, Clearance 0.05mm, Compression Ratio (Wossner) 14.50:1, OEM Compression Ratio 13.80:1, Dome Volume -1.78 cm³, Compression Height 19.80mm, Stroke 53.60mm, Theoretical Weight 136.00g. Cross-Reference OEM Part Numbers: Wossner Part No. 8922DB, 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":"255326"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock54272_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock54272_1.jpg"],"description":"Wossner high-compression forged piston kit with a 77.01mm bore. Engineered for increased performance, the elliptical design ensures uniform bearing surface expansion, reducing localized pressure and preventing piston collapse. Manufactured in Germany for strength, durability, and efficient heat transfer. Features include high-compression design for enhanced performance, forged construction for increased strength and reliability, optimized heat transfer for efficient combustion, elliptical design for uniform bearing surface and even thrust load distribution, and is manufactured in Germany. Specifications: Bore Size 77.01mm, Clearance 0.05mm, Compression Ratio (Wossner) 14.50:1, OEM Compression Ratio 13.80:1, Dome Volume -1.78 cm³, Compression Height 19.80mm, Stroke 53.60mm, Theoretical Weight 136.00g. Cross-Reference OEM Part Numbers: Wossner Part No. 8922DB, Lock Part No. CW16, Pin Part No. WP087, Ring Set Part No. 770XAS-2.","descriptionMarkdown":"### Wossner High Compression Forged Piston Kit 77.01mm Bore\n\nUpgrade your engine's performance with this Wossner high-compression forged piston kit. Engineered for demanding riders, this kit provides a significant boost in power and efficiency.\n\n**Key Features:**\n\n\t\n- High Compression Design: Increases power output and throttle response.\n\t\n- Forged Construction: Offers superior strength, durability, and resistance to heat and stress compared to cast pistons.\n\t\n- Elliptical Piston Design: Features an optimized elliptical shape that allows for uniform expansion of the bearing surface as it heats up. This reduces localized pressure points and prevents piston collapse, ensuring a consistent fit and optimal performance throughout the operating temperature range.\n\t\n- Efficient Heat Transfer: Manufactured for excellent heat dissipation, contributing to stable engine temperatures and reliable operation.\n\t\n- Precision German Engineering: Manufactured in Germany to exacting standards, guaranteeing quality and performance.\n\n**Specifications:**\n\n\t\n- Bore Size: 77.01mm\n\t\n- Clearance: 0.05mm\n\t\n- Wossner Compression Ratio: 14.50:1\n\t\n- OEM Compression Ratio: 13.80:1\n\t\n- Dome Volume: -1.78 cm&sup3;\n\t\n- Compression Height: 19.80mm\n\t\n- Stroke: 53.60mm\n\t\n- Theoretical Weight: 136.00g\n\n**Wossner Part Numbers:**\n\n\t\n- Piston Kit: 8922DB\n\t\n- Lock Ring: CW16\n\t\n- Pin: WP087\n\t\n- Ring Set: 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-hc-high-compression-wossner-8922db-kxf250","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/e6b63b61e6dd:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/e6b63b61e6dd: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."]}}