{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"feacdf355a2c","name":"PISTON KIT YFZ450/R/X 95.00 A, WOSSNER 8601DA FORGED KIT 5TG-11631-12-00","sku":"56-W4865+00A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":224.89,"formatted":"£224.89"},"summary":"The Wossner 8601DA forged piston kit features a 95.00mm bore and is designed for Yamaha YFZ450 models. Manufactured in Germany, this piston is built for optimal strength, heat transfer, and durability under high-performance conditions. Its elliptical shape ensures even pressure distribution and minimizes the risk of piston collapse due to thermal expansion. Features include forged piston construction for enhanced strength and durability, designed for efficient heat transfer from the combustion chamber to cylinder walls, and an elliptical profile providing a uniform bearing surface under heat expansion, reducing localized pressure and preventing piston collapse. Specifications: Bore 95.00 mm, Actual Bore Diameter 94.95 mm, Display 449 cm&sup3;, Hub Stroke 62.00 mm, Clearance 0.05 mm, Compression Height 25.00 mm, Dome Volume -7.40 cm&sup3;, Compression Ratio OEM (11.90:1). Cross-Reference OEM Part Numbers: Piston 8601DA, Lock CW20, Pin WP038, Ring Set 950XSY, Rod P4029, Part No. 56-W4865+00A.WO, OEM Reference 5TG-11631-12-00, 4865M09500. Manufacturer Wossner.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"95mm"},{"label":"Variant Id","value":"256283"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock55229_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock55229_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock55229_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock55229_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock55229_4.jpg"],"description":"The Wossner 8601DA forged piston kit features a 95.00mm bore and is designed for Yamaha YFZ450 models. Manufactured in Germany, this piston is built for optimal strength, heat transfer, and durability under high-performance conditions. Its elliptical shape ensures even pressure distribution and minimizes the risk of piston collapse due to thermal expansion. Features include forged piston construction for enhanced strength and durability, designed for efficient heat transfer from the combustion chamber to cylinder walls, and an elliptical profile providing a uniform bearing surface under heat expansion, reducing localized pressure and preventing piston collapse. Specifications: Bore 95.00 mm, Actual Bore Diameter 94.95 mm, Display 449 cm&sup3;, Hub Stroke 62.00 mm, Clearance 0.05 mm, Compression Height 25.00 mm, Dome Volume -7.40 cm&sup3;, Compression Ratio OEM (11.90:1). Cross-Reference OEM Part Numbers: Piston 8601DA, Lock CW20, Pin WP038, Ring Set 950XSY, Rod P4029, Part No. 56-W4865+00A.WO, OEM Reference 5TG-11631-12-00, 4865M09500. Manufacturer Wossner.","descriptionMarkdown":"### Wossner 95.00mm Forged Piston Kit for Yamaha YFZ450\n\nElevate the performance and durability of your Yamaha YFZ450 with the Wossner 8601DA forged piston kit. Expertly manufactured in Germany, this high-quality piston is engineered for superior strength and resilience in demanding conditions. Its advanced elliptical design ensures optimal pressure distribution and thermal expansion management, preventing piston collapse and maximizing the lifespan of your engine.\n\n### Key Features:\n\n\t\n- Forged Construction: Provides exceptional strength and durability for high-performance applications.\n\t\n- Optimized Heat Transfer: Facilitates efficient cooling by transferring heat from the combustion chamber to the cylinder walls.\n\t\n- Elliptical Piston Profile: Creates a uniform bearing surface, even under extreme heat, reducing localized pressure.\n\t\n- Prevents Piston Collapse: The intelligent design mitigates the risk of piston failure due to thermal expansion.\n\t\n- German Engineering: Built to exacting standards for reliability and performance.\n\n### Specifications:\n\n\t\n- Bore Size: 95.00 mm\n\t\n- Actual Bore Diameter: 94.95 mm\n\t\n- Displacement: 449 cm&sup3;\n\t\n- Stroke: 62.00 mm\n\t\n- Piston Clearance: 0.05 mm\n\t\n- Compression Height: 25.00 mm\n\t\n- Dome Volume: -7.40 cm&sup3;\n\t\n- Compression Ratio: OEM (11.90:1)","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-yfz450rx-9500-a-wossner-8601da-forged-kit-5tg-11631-12-00","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/feacdf355a2c:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/feacdf355a2c: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."]}}