{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"33514bb62314","name":"PISTON KIT 1983 &85 YZ125 57mm, WOSSNER 8119D100 YAMAHA","sku":"56-W503+100.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":125.68,"formatted":"£125.68"},"summary":"Wossner forged piston kit features a 57mm bore (56.94mm) and is designed for use in Yamaha YZ125 models from 1983 and 1985. Manufactured in Germany, this piston is engineered for improved heat transfer, uniform bearing surface, and even thrust load distribution, reducing the risk of piston collapse under high-performance conditions. Features include forged piston construction for superior strength, engineered for optimal combustion chamber heat transfer, and elliptical design for uniform bearing surface under heat expansion. Specifications include a 57mm bore (56.94mm), 83 cm³ display volume, 84.00 mm stroke, 0.06 mm clearance, 30.80 mm compression height, and a 2-stroke compression ratio. Cross-reference OEM part numbers are 8119D100 for Piston, CW16 for Lock, WP036 for Pin, and RSB5700 for Ring Set.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"57mm"},{"label":"Variant Id","value":"256561"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W503_2B100_2EWO/94a66b588f7b6532.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W503_2B100_2EWO/94a66b588f7b6532.jpg"],"description":"Wossner forged piston kit features a 57mm bore (56.94mm) and is designed for use in Yamaha YZ125 models from 1983 and 1985. Manufactured in Germany, this piston is engineered for improved heat transfer, uniform bearing surface, and even thrust load distribution, reducing the risk of piston collapse under high-performance conditions. Features include forged piston construction for superior strength, engineered for optimal combustion chamber heat transfer, and elliptical design for uniform bearing surface under heat expansion. Specifications include a 57mm bore (56.94mm), 83 cm³ display volume, 84.00 mm stroke, 0.06 mm clearance, 30.80 mm compression height, and a 2-stroke compression ratio. Cross-reference OEM part numbers are 8119D100 for Piston, CW16 for Lock, WP036 for Pin, and RSB5700 for Ring Set.","descriptionMarkdown":"### Wossner Forged Piston Kit 57mm\n\nEnhance your motorcycle's performance with this Wossner forged piston kit, meticulously engineered for superior strength and heat dissipation. Manufactured in Germany, this piston features a precise 57mm bore (56.94mm) designed to withstand the demands of high-performance riding.\n\n**Key Features:**\n\n \n- Forged piston construction for exceptional durability and strength.\n \n- Optimized for superior combustion chamber heat transfer, leading to improved efficiency.\n \n- Elliptical design ensures a consistent bearing surface, even under thermal expansion, preventing piston collapse.\n \n- Precision German engineering and manufacturing.\n\n**Specifications:**\n\n \n- Bore Size: 57mm (actual 56.94mm)\n \n- Stroke: 84.00 mm\n \n- Clearance: 0.06 mm\n \n- Compression Height: 30.80 mm\n \n- Compression Ratio: 2-stroke (compatible with Wossner and OEM specifications)","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-1983-85-yz125-57mm-wossner-8119d100-yamaha","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/33514bb62314:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/33514bb62314:1"}},"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."]}}