{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"33f9b5b1b158","name":"PISTON KIT 95-05 YFM350 83.00, FORGED WOSSNER 8605DA 5UH-11631-00-C0, [8953DA PRO SERIES]","sku":"56-W4419+00A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":172.51,"formatted":"£172.51"},"summary":"Wossner forged piston kit for Yamaha YFM350 Warrior and Big Bear 1986-2005. Manufactured in Germany, this piston features a forged construction for enhanced durability and strength, optimized heat transfer for improved performance, and an elliptical design for uniform bearing surface and reduced wear. Designed for 4-stroke engines. Specifications: Bore Size 83.00 mm, Actual Bore 82.94 mm, Stroke 64.50 mm, Clearance 0.06 mm, Compression Height 28.30 mm, Dome Volume +2.30 cm³, Compression Ratio 9.20:1 (OEM), Displacement 349 cm³. Cross-reference OEM Part Numbers: Wossner 8605DA, Lock P/N CW19, Pin P/N WP026, Ring Set P/N 830XSY, Connecting Rod P/N P4034, OEM Piston 5UH-11631-00-C0. Other reference numbers include 4419M08300 and 8953DA (Pro Series). Weight 418g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"83mm"},{"label":"Variant Id","value":"255630"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4419_2B00A_2EWO/89f8ac088140fcd2.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4419_2B00A_2EWO/89f8ac088140fcd2.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4419_2B00A_2EWO/65ef39f665f45a61.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4419_2B00A_2EWO/81b2a45587db7934.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4419_2B00A_2EWO/87ccaa4d20bb1c65.jpg"],"description":"Wossner forged piston kit for Yamaha YFM350 Warrior and Big Bear 1986-2005. Manufactured in Germany, this piston features a forged construction for enhanced durability and strength, optimized heat transfer for improved performance, and an elliptical design for uniform bearing surface and reduced wear. Designed for 4-stroke engines. Specifications: Bore Size 83.00 mm, Actual Bore 82.94 mm, Stroke 64.50 mm, Clearance 0.06 mm, Compression Height 28.30 mm, Dome Volume +2.30 cm³, Compression Ratio 9.20:1 (OEM), Displacement 349 cm³. Cross-reference OEM Part Numbers: Wossner 8605DA, Lock P/N CW19, Pin P/N WP026, Ring Set P/N 830XSY, Connecting Rod P/N P4034, OEM Piston 5UH-11631-00-C0. Other reference numbers include 4419M08300 and 8953DA (Pro Series). Weight 418g.","descriptionMarkdown":"### Wossner Forged Piston Kit for Yamaha YFM350\n\nUpgrade your Yamaha YFM350 with this high-performance Wossner forged piston kit. Engineered for durability and optimal performance, this kit is manufactured in Germany using advanced forging techniques to ensure superior strength and efficient heat transfer. The innovative elliptical design promotes even load distribution across the piston's surface, significantly reducing localized pressure points and preventing premature wear or collapse.\n\n**Key Features:**\n\n\t\n- Forged construction for exceptional strength and longevity.\n\t\n- Advanced heat transfer properties for enhanced engine efficiency.\n\t\n- Elliptical design ensures uniform bearing surface and minimizes wear.\n\t\n- Specifically designed for 4-stroke engines.\n\n**Specifications:**\n\n\t\n- Bore Size: 83.00 mm\n\t\n- Actual Bore: 82.94 mm\n\t\n- Stroke: 64.50 mm\n\t\n- Clearance: 0.06 mm\n\t\n- Compression Height: 28.30 mm\n\t\n- Dome Volume: +2.30 cm&sup3;\n\t\n- Compression Ratio: 9.20:1 (OEM equivalent)\n\t\n- Displacement: 349 cm&sup3;\n\t\n- Manufacturing Origin: Germany\n\n**Part Details:**\n\n\t\n- Wossner Part Number: 8605DA\n\t\n- Series: PRO SERIES (Reference 8953DA)\n\t\n- Includes Lock Pin (P/N: CW19)\n\t\n- Includes Piston Pin (P/N: WP026)\n\t\n- Includes Ring Set (P/N: 830XSY)\n\t\n- Compatible with Connecting Rod P/N: P4034\n\n**Cross-Reference OEM Part Numbers:**\n\n\t\n- Yamaha OEM Piston: 5UH-11631-00-C0\n\t\n- Other Reference Numbers: 4419M08300","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-95-05-yfm350-8300-forged-wossner-8605da-5uh-11631-00-c0-8953da-pro-se","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/33f9b5b1b158:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/33f9b5b1b158:1"}},"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."]}}