{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"b0152ecdcfae","name":"PISTON KIT SET/4 R1, FZR, RX1, WOSSNER K8840DA-4 YAMAHA","sku":"56-W9900.000.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":false,"stock":0,"price":{"amount":793.43,"formatted":"£793.43"},"summary":"This Wossner piston kit features a set of 4 forged pistons with a standard 74.00mm bore (actual piston diameter 73.95mm). The elliptical profile ensures uniform thrust load distribution and thermal control, designed for efficient combustion heat transfer. Manufactured in Germany, this kit is for 1000cc-class engines with a stroke of 58.00mm, clearance of 0.05mm, and a Wossner compression ratio of 10.20:1. The dome volume is -2.60cm³, and the compression height is 22.80mm. Key specifications include part number K8840DA-4. Cross-reference OEM part numbers for the clip are CW17, piston pin WP083, and replacement ring set 740XDS. The kit has a weight of 1380 grams.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"259113"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W9900_2E000_2EWO/921ecafbffef07d1.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W9900_2E000_2EWO/921ecafbffef07d1.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W9900_2E000_2EWO/15a547e08b4e9fe2.jpg"],"description":"This Wossner piston kit features a set of 4 forged pistons with a standard 74.00mm bore (actual piston diameter 73.95mm). The elliptical profile ensures uniform thrust load distribution and thermal control, designed for efficient combustion heat transfer. Manufactured in Germany, this kit is for 1000cc-class engines with a stroke of 58.00mm, clearance of 0.05mm, and a Wossner compression ratio of 10.20:1. The dome volume is -2.60cm³, and the compression height is 22.80mm. Key specifications include part number K8840DA-4. Cross-reference OEM part numbers for the clip are CW17, piston pin WP083, and replacement ring set 740XDS. The kit has a weight of 1380 grams.","descriptionMarkdown":"### Wossner Piston Kit Set for Yamaha R1, FZR, RX1\n\nUpgrade your high-performance motorcycle engine with this premium Wossner Piston Kit. Designed for precision and durability, this set of four forged pistons is engineered to meet the demands of powerful 1000cc-class engines.\n\n### Key Features:\n\n\t\n- Set of 4 forged Wossner pistons for superior strength and performance.\n\t\n- Standard bore size of 74.00mm, with an actual piston diameter of 73.95mm.\n\t\n- Elliptical piston profile ensures uniform thrust load distribution and optimal thermal control, reducing stress and extending lifespan.\n\t\n- Engineered for efficient combustion heat transfer, contributing to improved engine efficiency.\n\t\n- Manufactured in Germany to exacting standards for reliability and precise fitment.\n\n### Specifications:\n\n\t\n- Part Number: K8840DA-4\n\t\n- Bore Size: 74.00mm (actual piston size 73.95mm)\n\t\n- Engine Displacement: 1000cc\n\t\n- Wossner Compression Ratio: 10.20:1\n\t\n- OEM Compression Ratio: 11.80:1\n\t\n- Dome Volume: -2.60cm&sup3;\n\t\n- Compression Height: 22.80mm\n\t\n- Piston Pin: WP083\n\t\n- Replacement Ring Set: 740XDS\n\t\n- Clip: CW17","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-set4-r1-fzr-rx1-wossner-k8840da-4-yamaha","buyOneNow":null,"basketWithThis":null}},"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."]}}