{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"5cd405e941e9","name":"PISTON KIT 86-88 YZ125 57.25, WOSSNER 8118D125 YAMAHA MX","sku":"56-W559+125.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":false,"stock":0,"price":{"amount":125.68,"formatted":"£125.68"},"summary":"Wossner 57.25mm forged piston kit. This piston is manufactured in Germany and features an elliptical design for consistent bearing surface under heat expansion, reduced localised stress, and even distribution of thrust loads. It also supports efficient thermal management by optimising combustion chamber heat transfer to the cylinder walls. Bore 57.25mm, actual diameter 57.19mm, displacement 123 cm&sup3;, stroke 50.00mm, clearance 0.06mm, compression height 30.00mm, compression ratio 2-stroke. Includes lock CW16, pin WP036, and ring set RSB5725. Wossner Piston Kit No.: 8118D125.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"57.25mm"},{"label":"Variant Id","value":"256823"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W559_2B125_2EWO/ef1bb144b486020c.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W559_2B125_2EWO/ef1bb144b486020c.jpg"],"description":"Wossner 57.25mm forged piston kit. This piston is manufactured in Germany and features an elliptical design for consistent bearing surface under heat expansion, reduced localised stress, and even distribution of thrust loads. It also supports efficient thermal management by optimising combustion chamber heat transfer to the cylinder walls. Bore 57.25mm, actual diameter 57.19mm, displacement 123 cm&sup3;, stroke 50.00mm, clearance 0.06mm, compression height 30.00mm, compression ratio 2-stroke. Includes lock CW16, pin WP036, and ring set RSB5725. Wossner Piston Kit No.: 8118D125.","descriptionMarkdown":"### Wossner 57.25mm Forged Piston Kit for Yamaha YZ125\n\nEnhance the performance and durability of your Yamaha YZ125 with this Wossner 57.25mm (+1.25 oversize) forged piston kit. Engineered and manufactured in Germany, this high-quality piston is designed to withstand the demands of two-stroke motocross riding.\n\n**Key Features:**\n\n- Forged Construction: Crafted using a forging process for superior strength and longevity.\n\n- Elliptical Design: Ensures a consistent bearing surface even under extreme heat expansion, reducing localized stress and distributing thrust loads evenly.\n\n- Optimized Thermal Management: Facilitates efficient heat transfer from the combustion chamber to the cylinder walls for reliable performance.\n\n- Reduced Stress and Wear: Prevents piston collapse by minimizing localized pressure and distributing thrust loads effectively.\n\n- German Engineering: Manufactured to exacting standards in Germany.\n\n**Specifications:**\n\n- Bore: 57.25mm\n\n- Actual Diameter: 57.19mm\n\n- Displacement: 123 cm&sup3;\n\n- Stroke: 50.00mm\n\n- Clearance: 0.06mm\n\n- Compression Height: 30.00mm\n\n- Compression Ratio: 2-stroke\n\n**Included Components:**\n\n- Piston Kit Part No.: 56-W559+\n\n- Wossner Piston Kit No.: 8118D125\n\n- Lock: CW16\n\n- Pin: WP036\n\n- Ring Set: RSB5725","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-86-88-yz125-5725-wossner-8118d125-yamaha-mx","buyOneNow":null,"basketWithThis":null}},"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."]}}