{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"03819485c72c","name":"PISTON KIT 81-19 PW50 41.50, 8267D150 WOSSNER YAMAHA","sku":"56-W938+150_WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":88.93,"formatted":"£88.93"},"summary":"Wossner forged piston kit is a +1.50mm oversize replacement with a 41.50mm bore size. The actual piston size is 41.45mm and it has a 39.20mm stroke and 0.05mm piston clearance. This piston kit features forged piston construction for enhanced strength and longevity, an elliptical design for a consistent bearing surface during heat expansion, and is optimised for efficient heat dissipation from the combustion chamber to cylinder walls. It also evenly distributes thrust loads to reduce the risk of piston collapse. This piston kit is manufactured in Germany and has a Wossner compression ratio of 2-stroke. Specifications include a compression height of 24.90mm, lock part number CW10, pin part number WP105, and ring set part number RSB4150. Cross-reference OEM part number is 8267D150.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"41.50mm"},{"label":"Variant Id","value":"258294"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock57240_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock57240_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57240_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57240_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57240_4.jpg"],"description":"Wossner forged piston kit is a +1.50mm oversize replacement with a 41.50mm bore size. The actual piston size is 41.45mm and it has a 39.20mm stroke and 0.05mm piston clearance. This piston kit features forged piston construction for enhanced strength and longevity, an elliptical design for a consistent bearing surface during heat expansion, and is optimised for efficient heat dissipation from the combustion chamber to cylinder walls. It also evenly distributes thrust loads to reduce the risk of piston collapse. This piston kit is manufactured in Germany and has a Wossner compression ratio of 2-stroke. Specifications include a compression height of 24.90mm, lock part number CW10, pin part number WP105, and ring set part number RSB4150. Cross-reference OEM part number is 8267D150.","descriptionMarkdown":"### Wossner Oversize Forged Piston Kit for Yamaha PW50\n\nThis Wossner forged piston kit is a high-performance replacement designed for Yamaha PW50 engines. Engineered for durability and optimal performance, this +1.50mm oversize piston is precision-manufactured in Germany to meet the demands of small-displacement two-stroke applications. It is an ideal choice for engines that require an overbore to restore or enhance power and reliability.\n\n### Key Features\n\n \n- Forged Piston Construction: Provides superior strength and longevity compared to cast pistons, ensuring it can withstand higher operating temperatures and pressures.\n \n- Elliptical Design: Features an elliptical skirt design that maintains a consistent bearing surface by compensating for heat expansion, promoting smoother operation and reduced wear.\n \n- Optimised Heat Dissipation: Engineered to efficiently transfer heat from the combustion chamber to the cylinder walls, helping to prevent pre-ignition and maintain optimal operating temperatures.\n \n- Even Thrust Load Distribution: The piston design is optimised to distribute thrust loads evenly across the piston skirt, significantly reducing the risk of piston collapse under stress.\n \n- German Manufacturing: Built to exacting standards in Germany, ensuring high quality and precision.\n\n### Specifications\n\n \n- Bore Size: 41.50mm\n \n- Actual Piston Size: 41.45mm\n \n- Stroke: 39.20mm\n \n- Piston Clearance: 0.05mm\n \n- Wossner Compression Ratio: 2-stroke\n \n- OEM Compression Ratio: 2-stroke\n \n- Compression Height: 24.90mm\n \n- Lock Part Number: CW10\n \n- Pin Part Number: WP105\n \n- Ring Set Part Number: RSB4150","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-81-19-pw50-4150-8267d150-wossner-yamaha","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/03819485c72c:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/03819485c72c: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."]}}