{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"d9c091bc6e3e","name":"PISTON KIT 14- YZF250 77mm HC, FORGED WOSSNER 8894DB","sku":"56-W4962.B.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":182.86,"formatted":"£182.86"},"summary":"Wossner 56-W4962.B.WO Forged Piston Kit. This high-compression piston kit features a 77mm bore and a forged construction for strength and durability. Manufactured in Germany, it is designed for efficient heat transfer and optimal performance with an elliptical profile for uniform expansion and balanced thrust loads. Bore size is 77.01mm with an actual piston size of 76.96mm. Specifications include a displacement of 249cm³, stroke of 53.60mm, clearance of 0.05mm, dome volume of -3.00cm³, Wossner compression ratio of 13.70:1, OEM compression ratio of 13.50:1, and compression height of 20.20mm. Cross-reference OEM part numbers: 1SM-11631-01-00, CW16 (Lock), WP087 (Pin), and 770XAS-2 (Ring Set).","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77mm"},{"label":"Variant Id","value":"256486"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4962_2EB_2EWO/e5e7a6cb582924d2.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4962_2EB_2EWO/e5e7a6cb582924d2.jpg"],"description":"Wossner 56-W4962.B.WO Forged Piston Kit. This high-compression piston kit features a 77mm bore and a forged construction for strength and durability. Manufactured in Germany, it is designed for efficient heat transfer and optimal performance with an elliptical profile for uniform expansion and balanced thrust loads. Bore size is 77.01mm with an actual piston size of 76.96mm. Specifications include a displacement of 249cm³, stroke of 53.60mm, clearance of 0.05mm, dome volume of -3.00cm³, Wossner compression ratio of 13.70:1, OEM compression ratio of 13.50:1, and compression height of 20.20mm. Cross-reference OEM part numbers: 1SM-11631-01-00, CW16 (Lock), WP087 (Pin), and 770XAS-2 (Ring Set).","descriptionMarkdown":"### Wossner Forged Piston Kit 77mm High Compression\n\nUpgrade your engine's performance with this premium Wossner forged piston kit. Engineered in Germany for superior durability and efficiency, this piston is designed to deliver optimal power and reliable operation for your motorcycle.\n\n**Key Features:**\n\n\t\n- Forged Construction: Provides exceptional strength and high durability for demanding conditions.\n\t\n- High Compression Design: Enhances engine performance and power output.\n\t\n- Elliptical Shape: Promotes uniform expansion and balanced thrust loads for smoother operation.\n\t\n- Efficient Heat Transfer: Designed to effectively manage heat from the combustion chamber, contributing to longevity.\n\t\n- German Engineering: Manufactured to the highest standards in Germany.\n\t\n- Direct Replacement: Intended as a direct OEM replacement part for straightforward installation.\n\t\n- Professional Installation Recommended: While designed for direct replacement, professional installation is advised if you are unsure.\n\n**Specifications:**\n\n\t\n- Bore Size: 77.01mm\n\t\n- Actual Piston Size: 76.96mm\n\t\n- Displacement: 249cm&sup3;\n\t\n- Stroke: 53.60mm\n\t\n- Clearance: 0.05mm\n\t\n- Dome Volume: -3.00cm&sup3;\n\t\n- Wossner Compression Ratio: 13.70:1\n\t\n- OEM Compression Ratio: 13.50:1\n\t\n- Compression Height: 20.20mm\n\n**Compatible with:**\n\n\t\n- Wossner Piston Kit 8894DB\n\t\n- Cross-Reference OEM Part Numbers: 1SM-11631-01-00\n\t\n- Includes Lock: CW16\n\t\n- Includes Pin: WP087\n\t\n- Includes Ring Set: 770XAS-2","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"WRF 250","cc":null,"notes":null,"years":"2015–2017"},{"make":"YAMAHA","model":"YZF 250","cc":null,"notes":null,"years":"2014–2015"}],"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-14-yzf250-77mm-hc-forged-wossner-8894db","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/d9c091bc6e3e:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/d9c091bc6e3e: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."]}}