{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"4e10845cbded","name":"PISTON KIT YZF WRF 250 3-RING, WOSSNER 8712DC 08-13 77mm","sku":"56-W240+00C.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 77.02mm bore and 76.98mm diameter. This 3-ring piston is engineered for durability and high performance, featuring superior strength and design. Manufactured in Germany, it ensures optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Features: Forged construction for superior strength; Optimized heat transfer for efficient combustion; Elliptical design for uniform load distribution; 3-ring piston design for durability; Manufactured in Germany. Specifications: Bore: 77.02mm; Diameter: 76.98mm; Display (cm³): 249; Stroke (mm): 53.60; Clearance (mm): 0.04; Wossner Compression Ratio: OEM; OEM Compression Ratio: 13.50:1; Dome Volume (cm³): -2.90; Compression Height (mm): 22.20. Includes Lock P/N: CW16, Pin P/N: WP059, Ring Set P/N: 770XAS-2, Rod P/N: P4005.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"255157"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock54103_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock54103_1.jpg"],"description":"Wossner forged piston kit with a 77.02mm bore and 76.98mm diameter. This 3-ring piston is engineered for durability and high performance, featuring superior strength and design. Manufactured in Germany, it ensures optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Features: Forged construction for superior strength; Optimized heat transfer for efficient combustion; Elliptical design for uniform load distribution; 3-ring piston design for durability; Manufactured in Germany. Specifications: Bore: 77.02mm; Diameter: 76.98mm; Display (cm³): 249; Stroke (mm): 53.60; Clearance (mm): 0.04; Wossner Compression Ratio: OEM; OEM Compression Ratio: 13.50:1; Dome Volume (cm³): -2.90; Compression Height (mm): 22.20. Includes Lock P/N: CW16, Pin P/N: WP059, Ring Set P/N: 770XAS-2, Rod P/N: P4005.","descriptionMarkdown":"### Wossner Forged Piston Kit for Yamaha YZF/WRF 250\n\nUpgrade your Yamaha YZ250F or WR250F engine with this high-performance Wossner forged piston kit. Engineered for exceptional durability and power, this 3-ring piston is crafted in Germany to exacting standards. Its advanced design ensures optimal heat transfer, promoting efficient combustion and longevity. The elliptical piston shape provides a uniform bearing surface, distributing thrust loads evenly to prevent localized pressure and piston collapse, even under extreme heat and expansion.\n\n#### Key Features:\n\n\t\n- Forged construction for superior strength and resilience\n\t\n- Elliptical piston design for balanced load distribution and reduced wear\n\t\n- 3-ring configuration for enhanced durability and performance\n\t\n- Optimized for efficient heat transfer to cylinder walls\n\t\n- Precision manufactured in Germany\n\n#### Specifications:\n\n\t\n- Bore Size: 77.02mm\n\t\n- Piston Diameter: 76.98mm\n\t\n- Engine Displacement: 249 cm³\n\t\n- Stroke: 53.60 mm\n\t\n- Recommended Piston Clearance: 0.04 mm\n\t\n- Dome Volume: -2.90 cm³\n\t\n- Compression Height: 22.20 mm\n\t\n- Wossner Compression Ratio: OEM\n\t\n- OEM Compression Ratio: 13.50:1","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-yzf-wrf-250-3-ring-wossner-8712dc-08-13-77mm","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/4e10845cbded:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/4e10845cbded: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."]}}