{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"0e71000f2696","name":"PISTON KIT 14-15 YZF250 77.00, FORGED WOSSNER 8893DA, 1SM-11631-01-00","sku":"56-W4961.A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":182.86,"formatted":"£182.86"},"summary":"This Wossner forged piston kit, part number 8893DA, features a standard 77mm bore with an actual piston size of 76.96mm. Manufactured in Germany, the piston is designed for high-performance four-stroke applications, offering superior heat transfer, strength, and pressure distribution due to its elliptical profile. Features include forged construction for strength and durability, an elliptical design for uniform expansion and thrust load balance, and optimized heat transfer. It is a direct OEM replacement and easy to install; professional installation is recommended if unsure. Specifications include a bore size of 77.00mm, actual piston size of 76.96mm, 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 include 40116M07700, 1SM-11631-01-00, CW16, WP087, and 770XAS-2.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77mm"},{"label":"Variant Id","value":"256476"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4961_2EA_2EWO/ee4c8a361686f077.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4961_2EA_2EWO/ee4c8a361686f077.jpg"],"description":"This Wossner forged piston kit, part number 8893DA, features a standard 77mm bore with an actual piston size of 76.96mm. Manufactured in Germany, the piston is designed for high-performance four-stroke applications, offering superior heat transfer, strength, and pressure distribution due to its elliptical profile. Features include forged construction for strength and durability, an elliptical design for uniform expansion and thrust load balance, and optimized heat transfer. It is a direct OEM replacement and easy to install; professional installation is recommended if unsure. Specifications include a bore size of 77.00mm, actual piston size of 76.96mm, 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 include 40116M07700, 1SM-11631-01-00, CW16, WP087, and 770XAS-2.","descriptionMarkdown":"### Wossner Forged Piston Kit 77.00mm Bore\n\nThis high-performance Wossner forged piston kit is engineered for power and durability. Manufactured in Germany, this piston is designed to offer superior heat transfer, strength, and improved pressure distribution for demanding four-stroke applications.\n\n**Key Features:**\n\n\t\n- Forged Construction: Provides exceptional strength and longevity for high-performance engines.\n\t\n- Elliptical Piston Design: Ensures uniform expansion and balances thrust loads for smoother operation.\n\t\n- Optimized Heat Transfer: Engineered to efficiently manage heat, crucial for preventing engine damage under stress.\n\t\n- Precision Machining: Features a standard 77.00mm bore size with an actual piston measurement of 76.96mm for a precise fit.\n\t\n- Made in Germany: Guarantees high-quality manufacturing standards.\n\t\n- Direct Replacement: Designed to be a direct OEM replacement for ease of installation.\n\n**Specifications:**\n\n\t\n- Bore Size: 77.00mm\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**Cross-Reference OEM Part Numbers:**\n\n\t\n- 40116M07700\n\t\n- 1SM-11631-01-00\n\t\n- CW16 (Lock)\n\t\n- WP087 (Pin)\n\t\n- 770XAS-2 (Ring Set)","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"WR 250F","cc":null,"notes":null,"years":"2015–2019"},{"make":"YAMAHA","model":"WRF 250","cc":null,"notes":null,"years":"2014–2018"},{"make":"YAMAHA","model":"YZ 250F","cc":null,"notes":null,"years":"2014–2018"},{"make":"YAMAHA","model":"YZ 250FX","cc":null,"notes":null,"years":"2014–2019"},{"make":"YAMAHA","model":"YZF 250","cc":null,"notes":null,"years":"2014–2015"},{"make":"YAMAHA","model":"YZF X 250","cc":null,"notes":null,"years":"2014–2019"}],"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-14-15-yzf250-7700-forged-wossner-8893da-1sm-11631-01-00","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/0e71000f2696:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/0e71000f2696:1"}},"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."]}}