{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"255ff7fec574","name":"PISTON KIT-4 KZ1000J,R D73.00, WOSSNER K8796D350-4 KAWASAKI","sku":"56-W9934.350.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":793.43,"formatted":"£793.43"},"summary":"Wossner 4-piston kit for Kawasaki KZ1000J and KZ1000R models with a 73.00mm bore. This kit includes four forged pistons with a 72.94mm diameter and a +3.5mm oversize fitment. Engineered for increased displacement and improved compression, this kit enhances engine performance while maintaining structural reliability. Features include forged piston construction for superior strength and durability, optimized heat transfer for efficient combustion, an elliptical profile for uniform bearing surfaces under heat expansion, and reduced localized pressure distribution to prevent piston collapse. Manufactured in Germany, the complete kit includes 4 pistons, pins, rings, and circlips. Specifications: Bore 73.00mm, Diameter 72.94mm, Engine Displacement 1075 / 1105 cm³, Stroke 66.00 mm, Clearance 0.06 mm, Compression Ratio (Wossner) 1075 cc = 10.30:1 / 1105 cc = 10.50:1, Compression Ratio (OEM) 9.20:1, Dome Volume 18.80 cm³, Compression Height 25.30 mm, Theoretical Weight 25.30 g, Engine Cylinders 4, Clips P/N CW17, Pin P/N WP083, Ring Set P/N 730XDS. Cross-reference OEM Part Numbers: 56-W9934.350.WO, Wossner Piston K8796D350-4.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"73.00mm"},{"label":"Variant Id","value":"259236"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock58182_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock58182_1.jpg"],"description":"Wossner 4-piston kit for Kawasaki KZ1000J and KZ1000R models with a 73.00mm bore. This kit includes four forged pistons with a 72.94mm diameter and a +3.5mm oversize fitment. Engineered for increased displacement and improved compression, this kit enhances engine performance while maintaining structural reliability. Features include forged piston construction for superior strength and durability, optimized heat transfer for efficient combustion, an elliptical profile for uniform bearing surfaces under heat expansion, and reduced localized pressure distribution to prevent piston collapse. Manufactured in Germany, the complete kit includes 4 pistons, pins, rings, and circlips. Specifications: Bore 73.00mm, Diameter 72.94mm, Engine Displacement 1075 / 1105 cm³, Stroke 66.00 mm, Clearance 0.06 mm, Compression Ratio (Wossner) 1075 cc = 10.30:1 / 1105 cc = 10.50:1, Compression Ratio (OEM) 9.20:1, Dome Volume 18.80 cm³, Compression Height 25.30 mm, Theoretical Weight 25.30 g, Engine Cylinders 4, Clips P/N CW17, Pin P/N WP083, Ring Set P/N 730XDS. Cross-reference OEM Part Numbers: 56-W9934.350.WO, Wossner Piston K8796D350-4.","descriptionMarkdown":"### Wossner 4 Piece Forged Piston Kit - 73.00mm Bore\n\nEnhance your motorcycle's engine performance with this high-quality Wossner piston kit. Designed for increased displacement and improved compression, this kit is engineered for durability and reliability under demanding conditions.\n\n### Key Features:\n\n\t\n- Forged piston construction for superior strength and longevity.\n\t\n- Optimized for efficient heat transfer from the combustion chamber to the cylinder walls.\n\t\n- Elliptical piston profile ensures a uniform bearing surface, even with heat expansion.\n\t\n- Reduces localized pressure and evenly distributes thrust loads to prevent piston collapse.\n\t\n- Manufactured in Germany to exacting standards.\n\t\n- Complete kit includes four pistons, pins, rings, and circlips for a full engine rebuild.\n\n### Specifications:\n\n\t\n- Bore: 73.00mm\n\t\n- Diameter: 72.94mm\n\t\n- Engine Displacement: 1075 cm&sup3; / 1105 cm&sup3;\n\t\n- Stroke: 66.00 mm\n\t\n- Clearance: 0.06 mm\n\t\n- Compression Ratio (Wossner): 10.30:1 (1075 cc) / 10.50:1 (1105 cc)\n\t\n- Compression Ratio (OEM): 9.20:1\n\t\n- Dome Volume: 18.80 cm&sup3;\n\t\n- Compression Height: 25.30 mm\n\t\n- Theoretical Weight: 25.30 g\n\t\n- Engine Cylinders: 4\n\t\n- Clips Part Number: CW17\n\t\n- Pin Part Number: WP083\n\t\n- Ring Set Part Number: 730XDS\n\n**Part Numbers:** Wossner K8796D350-4","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"KZ J 1000","cc":null,"notes":null,"years":"1981–1983"},{"make":"KAWASAKI","model":"KZ R 1000","cc":null,"notes":null,"years":"1981–1983"}],"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-4-kz1000jr-d7300-wossner-k8796d350-4-kawasaki","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/255ff7fec574:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/255ff7fec574:1"}},"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."]}}