{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"c9fd5bf8a4b5","name":"PISTON KIT 76-82 YZ125 56.00, FORGED WOSSNER 8115DA, 1G8-11630-00-00","sku":"56-W435+00A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":134.39,"formatted":"£134.39"},"summary":"Wossner forged piston kit designed for Yamaha YZ125 models. Manufactured in Germany, this piston offers superior strength and heat transfer efficiency. The elliptical design ensures even load distribution, reducing localized pressure and preventing piston collapse. Features include forged construction for enhanced durability and strength, optimized heat transfer for improved performance, an elliptical design for a uniform bearing surface and reduced wear, and it is designed for 2-stroke engines. Specifications: Bore Size 56.00 mm, Actual Bore 55.94 mm, Stroke 56.50 mm, Clearance 0.06 mm, Compression Height 25.40 mm, Dome Volume +6.40 cm&sup3;, Compression Ratio 10.50:1 (OEM), Displacement 123 cm&sup3;. Made in Germany. Wossner Part No. 8155DA, Lock P/N CW16, Pin P/N WP036, Ring Set P/N RSB5600, OEM Piston 1G8-11630-00-00, Other Reference Numbers 435M05600. Weight 208g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"56mm"},{"label":"Variant Id","value":"255584"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock54530_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock54530_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54530_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54530_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54530_4.jpg"],"description":"Wossner forged piston kit designed for Yamaha YZ125 models. Manufactured in Germany, this piston offers superior strength and heat transfer efficiency. The elliptical design ensures even load distribution, reducing localized pressure and preventing piston collapse. Features include forged construction for enhanced durability and strength, optimized heat transfer for improved performance, an elliptical design for a uniform bearing surface and reduced wear, and it is designed for 2-stroke engines. Specifications: Bore Size 56.00 mm, Actual Bore 55.94 mm, Stroke 56.50 mm, Clearance 0.06 mm, Compression Height 25.40 mm, Dome Volume +6.40 cm&sup3;, Compression Ratio 10.50:1 (OEM), Displacement 123 cm&sup3;. Made in Germany. Wossner Part No. 8155DA, Lock P/N CW16, Pin P/N WP036, Ring Set P/N RSB5600, OEM Piston 1G8-11630-00-00, Other Reference Numbers 435M05600. Weight 208g.","descriptionMarkdown":"### Wossner Forged Piston Kit for Yamaha YZ125 (1976-1982)\n\nUpgrade your Yamaha YZ125's performance with this high-quality Wossner forged piston kit. Expertly manufactured in Germany, this piston is engineered for superior strength, durability, and efficient heat transfer, crucial for demanding 2-stroke applications.\n\nThe advanced elliptical design ensures even load distribution across the piston's surface. This intelligent engineering reduces localized pressure points, significantly minimizing the risk of piston collapse and promoting longer service life.\n\n**Key Features:**\n\n\t\n- Forged Construction: Provides exceptional strength and resilience, outperforming cast pistons for demanding use.\n\t\n- Optimized Heat Transfer: Enhances thermal efficiency for improved engine performance and reliability.\n\t\n- Elliptical Design: Creates a uniform bearing surface, reducing wear and ensuring consistent operation.\n\t\n- Designed for 2-Stroke Engines: Specifically tailored for the unique demands of 2-stroke powerplants.\n\n**Specifications:**\n\n\t\n- Bore Size: 56.00 mm\n\t\n- Actual Bore: 55.94 mm\n\t\n- Stroke: 56.50 mm\n\t\n- Clearance: 0.06 mm\n\t\n- Compression Height: 25.40 mm\n\t\n- Dome Volume: +6.40 cm&sup3;\n\t\n- Compression Ratio: 10.50:1 (OEM)\n\t\n- Displacement: 123 cm&sup3;\n\t\n- Manufacturing Origin: Germany\n\n**Cross-Reference OEM Part Numbers:**\n\n\t\n- Wossner Part No.: 8155DA\n\t\n- Lock P/N: CW16\n\t\n- Pin P/N: WP036\n\t\n- Ring Set P/N: RSB5600\n\t\n- OEM Piston: 1G8-11630-00-00\n\t\n- Other Reference Numbers: 435M05600","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-76-82-yz125-5600-forged-wossner-8115da-1g8-11630-00-00","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/c9fd5bf8a4b5:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/c9fd5bf8a4b5:1"}},"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."]}}