{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"ec72009dce55","name":"PISTON KIT 81-82 GPZ1100 KAW, WOSSNER K8819D150-4 PIN 17mm, KAWASAKI","sku":"56-W9811.74.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":793.43,"formatted":"£793.43"},"summary":"Wossner 74mm bore piston kit with a 17mm pin. Forged in Germany for strength and performance, this piston is engineered for efficient heat transfer and uniform load distribution under thermal expansion. Its elliptical design reduces localized stress and helps prevent piston failure. Features: forged construction for superior strength and durability, designed for optimal combustion chamber heat dissipation, elliptical profile ensures uniform bearing surface under heat expansion, even thrust load distribution reduces risk of piston collapse, manufactured in Germany. Specifications: Bore 74mm (Standard), Actual bore 73.94mm, Display volume 1135 / 1166 cm&sup3;, Stroke 66.00mm, Clearance 0.06mm, Wossner compression ratio 10.30:1, OEM compression ratio 18.90:1, Dome volume +16.50 cm&sup3;, Compression height 25.30mm, Pin diameter 17mm, Lock Part Number CW17, Pin Part Number WP083, Ring Set Part Number 790XDS. Cross-Reference OEM Part Numbers: 56-W9811.74.WO, K8819D150-4.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"258796"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W9811_2E74_2EWO/b60094c6559b68ee.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W9811_2E74_2EWO/b60094c6559b68ee.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W9811_2E74_2EWO/6752dda38b930fc5.jpg"],"description":"Wossner 74mm bore piston kit with a 17mm pin. Forged in Germany for strength and performance, this piston is engineered for efficient heat transfer and uniform load distribution under thermal expansion. Its elliptical design reduces localized stress and helps prevent piston failure. Features: forged construction for superior strength and durability, designed for optimal combustion chamber heat dissipation, elliptical profile ensures uniform bearing surface under heat expansion, even thrust load distribution reduces risk of piston collapse, manufactured in Germany. Specifications: Bore 74mm (Standard), Actual bore 73.94mm, Display volume 1135 / 1166 cm&sup3;, Stroke 66.00mm, Clearance 0.06mm, Wossner compression ratio 10.30:1, OEM compression ratio 18.90:1, Dome volume +16.50 cm&sup3;, Compression height 25.30mm, Pin diameter 17mm, Lock Part Number CW17, Pin Part Number WP083, Ring Set Part Number 790XDS. Cross-Reference OEM Part Numbers: 56-W9811.74.WO, K8819D150-4.","descriptionMarkdown":"### Wossner 74mm Piston Kit\n\nThis Wossner piston kit features a 74mm bore and is designed for high performance and durability. Forged in Germany, this piston is engineered for efficient heat transfer and uniform load distribution, even under extreme thermal expansion. Its specialized elliptical design actively reduces localized stress, helping to prevent piston failure in demanding conditions.\n\n### Key Features\n\n \n- Forged construction ensures superior strength and longevity.\n \n- Engineered for optimal heat dissipation from the combustion chamber.\n \n- Elliptical profile guarantees a uniform bearing surface during heat expansion.\n \n- Even thrust load distribution minimizes the risk of piston collapse.\n \n- Precision manufactured in Germany.\n\n### Specifications\n\n \n- Bore: 74mm (Standard)\n \n- Actual Bore: 73.94mm\n \n- Display Volume: 1135 / 1166 cm&sup3;\n \n- Stroke: 66.00mm\n \n- Clearance: 0.06mm\n \n- Wossner Compression Ratio: 10.30:1\n \n- OEM Compression Ratio: 18.90:1\n \n- Dome Volume: +16.50 cm&sup3;\n \n- Compression Height: 25.30mm\n \n- Pin Diameter: 17mm\n \n- Lock Part Number: CW17\n \n- Pin Part Number: WP083\n \n- Ring Set Part Number: 790XDS","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"GPZ 1100","cc":null,"notes":null,"years":"1981–1982"}],"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-81-82-gpz1100-kaw-wossner-k8819d150-4-pin-17mm-kawasaki","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/ec72009dce55:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/ec72009dce55:1"}},"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."]}}