{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"0cf9382ac71a","name":"PISTON KIT YZF WRF 250 2-RING, WOSSNER 8713D300 08-13 77mm","sku":"56-W241+300.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":148.46,"formatted":"£148.46"},"summary":"Wossner forged piston kit with an 80.00mm bore and 79.95mm diameter. This 2-ring piston is engineered for 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 include forged construction for superior strength, optimized heat transfer for efficient combustion, an elliptical design for uniform load distribution, a 2-ring piston design for performance applications, increased compression ratio for improved power output, and it is manufactured in Germany. Specifications: Bore 80.00mm, Diameter 79.95mm, Display (cm³) 249, Stroke (mm) 53.60, Clearance (mm) 0.04, Wossner Compression Ratio 14.10:1, OEM Compression Ratio 13.50:1, Dome Volume (cm³) -5.00, Compression Height (mm) 22.50. Cross-Reference OEM Part Numbers include Wossner Piston Yamaha YZ250F (PN# 8713D300), Lock P/N: CW16, Pin P/N: WP059, Ring Set P/N: 800XAS, Rod P/N: P4005.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"255162"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock54108_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock54108_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54108_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54108_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54108_4.jpg"],"description":"Wossner forged piston kit with an 80.00mm bore and 79.95mm diameter. This 2-ring piston is engineered for 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 include forged construction for superior strength, optimized heat transfer for efficient combustion, an elliptical design for uniform load distribution, a 2-ring piston design for performance applications, increased compression ratio for improved power output, and it is manufactured in Germany. Specifications: Bore 80.00mm, Diameter 79.95mm, Display (cm³) 249, Stroke (mm) 53.60, Clearance (mm) 0.04, Wossner Compression Ratio 14.10:1, OEM Compression Ratio 13.50:1, Dome Volume (cm³) -5.00, Compression Height (mm) 22.50. Cross-Reference OEM Part Numbers include Wossner Piston Yamaha YZ250F (PN# 8713D300), Lock P/N: CW16, Pin P/N: WP059, Ring Set P/N: 800XAS, Rod P/N: P4005.","descriptionMarkdown":"### Wossner 2-Ring Forged Piston Kit for Yamaha YZF/WRF 250\n\n Upgrade your Yamaha YZF or WRF 250 with this high-performance Wossner forged piston kit. Engineered in Germany, this 2-ring piston is designed for maximum strength and durability, delivering a significant boost in power output and combustion efficiency.\n\n#### Key Features\n\n \n- Forged Construction: Provides superior strength and resilience compared to cast pistons.\n \n- Optimized Heat Transfer: Promotes efficient combustion and helps maintain optimal operating temperatures.\n \n- Elliptical Design: Ensures a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse.\n \n- 2-Ring Piston: Ideal for performance applications requiring enhanced sealing and power.\n \n- Increased Compression Ratio: Features a Wossner compression ratio of 14.10:1 (OEM 13.50:1) for improved power output.\n \n- Manufactured in Germany: Guarantees high quality and precision engineering.\n\n#### Specifications\n\n \n- Bore: 80.00mm\n \n- Diameter: 79.95mm\n \n- Displacement (cm³): 249\n \n- Stroke (mm): 53.60\n \n- Clearance (mm): 0.04\n \n- Wossner Compression Ratio: 14.10:1\n \n- OEM Compression Ratio: 13.50:1\n \n- Dome Volume (cm³): -5.00\n \n- Compression Height (mm): 22.50\n \n- Lock P/N: CW16\n \n- Pin P/N: WP059\n \n- Ring Set P/N: 800XAS","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-250-2-ring-wossner-8713d300-08-13-77mm","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/0cf9382ac71a:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/0cf9382ac71a: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."]}}