{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"aa9d5afa413b","name":"PISTON KIT 81-19 PW50 41.00, 8267D100 WOSSNER YAMAHA","sku":"56-W938+100_WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":88.93,"formatted":"£88.93"},"summary":"Wossner 81-19 PW50 41.00 piston kit. This Wossner forged piston kit is a +1.00mm oversize replacement for Yamaha PW50 models. Designed for two-stroke engine rebuilds requiring an increased bore size, it provides exceptional durability and precise thermal expansion characteristics. Forged construction ensures superior strength and wear resistance. Elliptical design delivers a uniform bearing surface under heat expansion. Efficient heat transfer from combustion chamber to cylinder walls. Prevents piston collapse by evenly distributing thrust loads. Manufactured in Germany. Bore Size: 41.00mm. Actual Piston Size: 40.95mm. Stroke: 39.20mm. Piston Clearance: 0.05mm. Wossner Compression Ratio: 2-stroke. OEM Compression Ratio: 2-stroke. Compression Height: 24.90mm. Lock Part Number: CW10. Pin Part Number: WP105. Ring Set Part Number: RSB4100. Cross-Reference OEM Part Numbers: Part No: 8267D100.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"41.00mm"},{"label":"Variant Id","value":"258290"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock57236_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock57236_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57236_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57236_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57236_4.jpg"],"description":"Wossner 81-19 PW50 41.00 piston kit. This Wossner forged piston kit is a +1.00mm oversize replacement for Yamaha PW50 models. Designed for two-stroke engine rebuilds requiring an increased bore size, it provides exceptional durability and precise thermal expansion characteristics. Forged construction ensures superior strength and wear resistance. Elliptical design delivers a uniform bearing surface under heat expansion. Efficient heat transfer from combustion chamber to cylinder walls. Prevents piston collapse by evenly distributing thrust loads. Manufactured in Germany. Bore Size: 41.00mm. Actual Piston Size: 40.95mm. Stroke: 39.20mm. Piston Clearance: 0.05mm. Wossner Compression Ratio: 2-stroke. OEM Compression Ratio: 2-stroke. Compression Height: 24.90mm. Lock Part Number: CW10. Pin Part Number: WP105. Ring Set Part Number: RSB4100. Cross-Reference OEM Part Numbers: Part No: 8267D100.","descriptionMarkdown":"### Wossner Forged Piston Kit +1.00mm Oversize for Yamaha PW50\n\nUpgrade your Yamaha PW50 engine with this high-performance Wossner forged piston kit. Specifically designed as a +1.00mm oversize replacement, this kit is ideal for engine rebuilds where increased bore size is required, offering superior durability and optimized thermal expansion for two-stroke engines.\n\n#### Key Features\n\n\t\n- Forged Construction: Provides exceptional strength and enhanced wear resistance for longevity.\n\t\n- Elliptical Design: Ensures a uniform bearing surface even under significant heat expansion, promoting smooth operation.\n\t\n- Efficient Heat Transfer: Facilitates effective heat dissipation from the combustion chamber to the cylinder walls, helping to prevent overheating.\n\t\n- Even Thrust Load Distribution: Prevents piston collapse by distributing thrust loads evenly across the piston surface.\n\t\n- German Manufacturing: Engineered and produced in Germany, ensuring high-quality standards and precision.\n\n#### Specifications\n\n\t\n- Bore Size: 41.00mm\n\t\n- Actual Piston Size: 40.95mm\n\t\n- Stroke: 39.20mm\n\t\n- Piston Clearance: 0.05mm\n\t\n- Compression Height: 24.90mm\n\t\n- Lock Part Number: CW10\n\t\n- Pin Part Number: WP105\n\t\n- Ring Set Part Number: RSB4100\n\n#### Cross-Reference OEM Part Numbers\n\n\t\n- Part No: 8267D100","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-pw50-4100-8267d100-wossner-yamaha","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/aa9d5afa413b:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/aa9d5afa413b: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."]}}