{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"50528740e8b4","name":"PISTON KIT 01-04 YZF250 77.00, FORGED WOSSNER 8559DB 3-RING","sku":"56-W4738+00B.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":182.86,"formatted":"£182.86"},"summary":"Wossner forged piston kit with a 77.01mm bore and 76.97mm size. Features a three-ring design for enhanced sealing and performance. Engineered to enhance heat transfer, ensuring uniform expansion and even thrust load distribution. The elliptical design prevents localized pressure and piston collapse. Manufactured in Germany. Specifications include OEM compression ratio, 12.50:1 OEM compression ratio, lock part number CW16, pin part number WP059, ring set part number 770XAS-2, displacement 249 cm&sup3;, stroke 53.6mm, clearance 0.04mm, dome volume -4.70 cm&sup3;, compression height 22.20mm. Part number 8559DB.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77mm"},{"label":"Variant Id","value":"256017"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock54963_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock54963_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54963_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54963_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54963_4.jpg"],"description":"Wossner forged piston kit with a 77.01mm bore and 76.97mm size. Features a three-ring design for enhanced sealing and performance. Engineered to enhance heat transfer, ensuring uniform expansion and even thrust load distribution. The elliptical design prevents localized pressure and piston collapse. Manufactured in Germany. Specifications include OEM compression ratio, 12.50:1 OEM compression ratio, lock part number CW16, pin part number WP059, ring set part number 770XAS-2, displacement 249 cm&sup3;, stroke 53.6mm, clearance 0.04mm, dome volume -4.70 cm&sup3;, compression height 22.20mm. Part number 8559DB.","descriptionMarkdown":"### Wossner Forged Piston Kit - Enhanced Performance and Durability\n\nUpgrade your motorcycle's performance with this high-strength forged piston kit from Wossner. Engineered for demanding applications, this piston is meticulously manufactured in Germany to deliver superior heat transfer, ensuring optimal combustion efficiency and uniform expansion. Its innovative elliptical design effectively prevents localized pressure and piston collapse, providing enhanced durability and reliability.\n\nThis three-ring piston kit is designed to provide superior sealing and maximize performance. Ideal for riders seeking to push the limits of their machine, this Wossner piston kit offers a significant advantage in both power and longevity.\n\n### Key Features:\n\n\t\n- High-Strength Forging: Crafted from premium materials for exceptional durability and resistance to extreme conditions.\n\t\n- Optimized Heat Transfer: Promotes efficient combustion and maintains consistent operating temperatures.\n\t\n- Elliptical Design: Ensures uniform expansion and reduces localized pressure points, preventing piston distortion.\n\t\n- Three-Ring Configuration: Delivers superior sealing for improved compression and performance.\n\t\n- German Engineering: Manufactured to the highest standards of quality and precision.\n\n### Specifications:\n\n\t\n- Bore Diameter: 77.01mm\n\t\n- Piston Size: 76.97mm\n\t\n- Part Number: 8559DB\n\t\n- Compression Ratio: OEM\n\t\n- OEM Compression Ratio: 12.50:1\n\t\n- Lock Pin Part Number: CW16\n\t\n- Pin Part Number: WP059\n\t\n- Ring Set Part Number: 770XAS-2\n\t\n- Displacement: 249 cm&sup3;\n\t\n- Stroke: 53.6mm\n\t\n- Clearance: 0.04mm\n\t\n- Dome Volume: -4.70 cm&sup3;\n\t\n- Compression Height: 22.20mm","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-01-04-yzf250-7700-forged-wossner-8559db-3-ring","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/50528740e8b4:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/50528740e8b4:1"}},"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."]}}