{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"a10f386d1a1c","name":"PISTON KIT 86-88 YZ125 56.75, WOSSNER 8118D075 YAMAHA MX","sku":"56-W559+075.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":false,"stock":0,"price":{"amount":122.21,"formatted":"£122.21"},"summary":"This Wossner 56.75mm (+0.75 oversize) forged piston kit is designed for Yamaha YZ125 models. Featuring a forged build and elliptical design, the piston is engineered for thermal expansion control, even thrust load distribution, and reliable performance in two-stroke engines. Manufactured in Germany, it ensures efficient heat transfer from the combustion chamber to the cylinder walls under demanding conditions. Features include forged piston construction for enhanced strength and durability, an elliptical design providing a consistent bearing surface under thermal expansion, and even distribution of thrust loads that minimises localised stress and prevents piston collapse. Specifications include a bore of 56.75mm, actual diameter of 56.69mm, displacement of 123 cm&sup3;, stroke of 50.00mm, clearance of 0.06mm, compression height of 30.00mm, and a compression ratio of 2-stroke. Cross-reference OEM part numbers include Piston Kit Part No.: 56-W559+075.WO, Wossner Piston Kit No.: 8118D075, Lock: CW16, Pin: WP036, and Ring Set: RSB5675.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"56.75mm"},{"label":"Variant Id","value":"256820"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W559_2B075_2EWO/ef1bb144b486020c.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W559_2B075_2EWO/ef1bb144b486020c.jpg"],"description":"This Wossner 56.75mm (+0.75 oversize) forged piston kit is designed for Yamaha YZ125 models. Featuring a forged build and elliptical design, the piston is engineered for thermal expansion control, even thrust load distribution, and reliable performance in two-stroke engines. Manufactured in Germany, it ensures efficient heat transfer from the combustion chamber to the cylinder walls under demanding conditions. Features include forged piston construction for enhanced strength and durability, an elliptical design providing a consistent bearing surface under thermal expansion, and even distribution of thrust loads that minimises localised stress and prevents piston collapse. Specifications include a bore of 56.75mm, actual diameter of 56.69mm, displacement of 123 cm&sup3;, stroke of 50.00mm, clearance of 0.06mm, compression height of 30.00mm, and a compression ratio of 2-stroke. Cross-reference OEM part numbers include Piston Kit Part No.: 56-W559+075.WO, Wossner Piston Kit No.: 8118D075, Lock: CW16, Pin: WP036, and Ring Set: RSB5675.","descriptionMarkdown":"### Wossner 56.75mm Forged Piston Kit for Yamaha YZ125\n\nThis Wossner forged piston kit is engineered for optimal performance and durability in demanding two-stroke engine applications. With a precise 56.75mm bore, this oversize piston is designed to replace worn or damaged original equipment, restoring power and efficiency.\n\n**Key Features:**\n\n \n- Forged piston construction for superior strength and longevity.\n \n- Elliptical design manages thermal expansion for a consistent bearing surface.\n \n- Promotes even distribution of thrust loads, preventing localized stress and piston collapse.\n \n- Optimized for efficient heat transfer from the combustion chamber to the cylinder walls, crucial for high-performance engines.\n \n- Manufactured in Germany to exacting standards.\n\n**Specifications:**\n\n \n- Bore: 56.75mm\n \n- Actual Diameter: 56.69mm\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 \n- Piston\n \n- Lock Ring: CW16\n \n- Pin: WP036\n \n- Ring Set: RSB5675","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-yz125-5675-wossner-8118d075-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."]}}