{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"4e7e7e8313d9","name":"PISTON KIT 90-01 ZX11 KAW, WOSSNER K8801D100-4 ROAD, KAWASAKI","sku":"56-W9814.77.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":793.43,"formatted":"£793.43"},"summary":"Wossner piston kit with a 77mm bore is a standard replacement for the Kawasaki Z11 (ZX11) models. Forged in Germany for high durability and optimal performance, it is engineered for efficient heat transfer and consistent expansion behaviour under thermal stress. The elliptical piston design distributes pressure evenly, helping to prevent piston collapse during high-load operation. Features include forged construction for enhanced strength and thermal resilience, optimised for efficient combustion chamber heat dissipation, and an elliptical design that provides a consistent bearing surface under heat expansion. It offers even thrust load distribution that minimises localised stress. Manufactured in Germany. Specifications: Bore: 77mm (Standard), Actual bore: 76.95mm, Display volume: 1080 / 1109 cm&sup3;, Stroke: 58.00mm, Clearance: 0.06mm, Wossner compression ratio: OEM, OEM compression ratio: 11.00:1, Dome volume: -3.70 cm&sup3;, Compression height: 25.00mm, Theoretical weight: 209.00g, Lock Part Number: CW18, Pin Part Number: WP031, Ring Set Part Number: 770XDS.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"258799"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock57745_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock57745_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57745_2.jpg"],"description":"Wossner piston kit with a 77mm bore is a standard replacement for the Kawasaki Z11 (ZX11) models. Forged in Germany for high durability and optimal performance, it is engineered for efficient heat transfer and consistent expansion behaviour under thermal stress. The elliptical piston design distributes pressure evenly, helping to prevent piston collapse during high-load operation. Features include forged construction for enhanced strength and thermal resilience, optimised for efficient combustion chamber heat dissipation, and an elliptical design that provides a consistent bearing surface under heat expansion. It offers even thrust load distribution that minimises localised stress. Manufactured in Germany. Specifications: Bore: 77mm (Standard), Actual bore: 76.95mm, Display volume: 1080 / 1109 cm&sup3;, Stroke: 58.00mm, Clearance: 0.06mm, Wossner compression ratio: OEM, OEM compression ratio: 11.00:1, Dome volume: -3.70 cm&sup3;, Compression height: 25.00mm, Theoretical weight: 209.00g, Lock Part Number: CW18, Pin Part Number: WP031, Ring Set Part Number: 770XDS.","descriptionMarkdown":"### Wossner Forged Piston Kit 77mm Bore for Kawasaki ZX11 (1990-2001)\n\nUpgrade your Kawasaki ZX11 (1990-2001) with this high-performance Wossner forged piston kit. Engineered and manufactured in Germany, this kit features a 77mm bore and is designed for exceptional durability and optimal engine performance. The forged construction provides superior strength and thermal resilience, ensuring consistent operation even under demanding conditions.\n\nThis Wossner piston kit is engineered for efficient heat transfer and expansion, crucial for maintaining stability during high-load scenarios. Its innovative elliptical design promotes even pressure distribution and maintains a consistent bearing surface as the piston expands under heat, helping to prevent piston collapse and minimize localized stress. Achieve OEM compression ratios with a direct fit replacement designed for longevity and power.\n\n#### Key Features:\n\n \n- Forged construction for enhanced strength and thermal resilience\n \n- Optimised for efficient combustion chamber heat dissipation\n \n- Elliptical piston design for consistent bearing surface under heat expansion\n \n- Even thrust load distribution minimizes localized stress\n \n- Manufactured in Germany for premium quality\n \n- Standard bore size: 77mm\n \n- Actual bore size: 76.95mm\n \n- Wossner compression ratio: OEM\n \n- OEM compression ratio: 11.00:1\n\n#### Specifications:\n\n \n- Bore: 77mm (Standard)\n \n- Actual Bore: 76.95mm\n \n- Display Volume: 1080 / 1109 cm&sup3;\n \n- Stroke: 58.00mm\n \n- Clearance: 0.06mm\n \n- Dome Volume: -3.70 cm&sup3;\n \n- Compression Height: 25.00mm\n \n- Theoretical Weight: 209.00g\n \n- Lock Part Number: CW18\n \n- Pin Part Number: WP031\n \n- Ring Set Part Number: 770XDS","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-90-01-zx11-kaw-wossner-k8801d100-4-road-kawasaki","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/4e7e7e8313d9:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/4e7e7e8313d9:1"}},"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."]}}