{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"063e3d6aca4e","name":"PISTON KIT 77-78 YZ400 86.00, WOSSNER 8264D100 YAMAHA MX, 77-78 IT400","sku":"56-W550_1.00.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":195.02,"formatted":"£195.02"},"summary":"Wossner piston kit with an 86mm bore size (85.92mm actual). Forged in Germany for optimal strength and heat management. Features an elliptical profile that distributes thrust loads uniformly during thermal expansion, reducing localised pressure and minimising the risk of piston collapse. Forged construction for enhanced structural integrity. Elliptical design ensures uniform load distribution under heat expansion. Promotes efficient heat transfer from the combustion chamber to the cylinder walls. Manufactured in Germany. Specifications: Bore Size 86mm (85.92mm), Display 398 cm³, Stroke 82.00 mm, Clearance 0.08 mm, Compression Height 40.00 mm, Compression Ratio 2-stroke (Wossner and OEM). Cross-Reference OEM Part Numbers: Piston Kit 8264D100, Lock CW18, Pin WP042, Ring Set RSC8600 x2, Part No. 56-W550_1.00.WO. Weight 510g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"86mm"},{"label":"Variant Id","value":"256748"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock55694_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock55694_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock55694_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock55694_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock55694_4.jpg"],"description":"Wossner piston kit with an 86mm bore size (85.92mm actual). Forged in Germany for optimal strength and heat management. Features an elliptical profile that distributes thrust loads uniformly during thermal expansion, reducing localised pressure and minimising the risk of piston collapse. Forged construction for enhanced structural integrity. Elliptical design ensures uniform load distribution under heat expansion. Promotes efficient heat transfer from the combustion chamber to the cylinder walls. Manufactured in Germany. Specifications: Bore Size 86mm (85.92mm), Display 398 cm³, Stroke 82.00 mm, Clearance 0.08 mm, Compression Height 40.00 mm, Compression Ratio 2-stroke (Wossner and OEM). Cross-Reference OEM Part Numbers: Piston Kit 8264D100, Lock CW18, Pin WP042, Ring Set RSC8600 x2, Part No. 56-W550_1.00.WO. Weight 510g.","descriptionMarkdown":"### Wossner 86mm Piston Kit for Yamaha YZ400 & IT425\n\n\tThis high-performance Wossner piston kit is engineered for optimal strength, durability, and heat management in your Yamaha YZ400 and IT425 motorcycles. Manufactured in Germany, this piston features a forged construction for superior structural integrity and an advanced elliptical profile. This innovative design ensures uniform load distribution as the piston expands and contracts with heat, significantly reducing localized pressure points and mitigating the risk of piston collapse for enhanced longevity. The piston promotes efficient heat transfer from the combustion chamber to the cylinder walls, contributing to optimal engine performance.\n\n#### Key Features:\n\n\t\n- Forged construction for enhanced structural integrity and durability.\n\t\n- Elliptical piston profile ensures uniform load distribution under thermal expansion.\n\t\n- Reduces localized pressure points and minimizes the risk of piston collapse.\n\t\n- Promotes efficient heat transfer from the combustion chamber.\n\t\n- Manufactured to exacting standards in Germany.\n\n#### Specifications:\n\n\t\n- Bore Size: 86mm (85.92mm actual)\n\t\n- Displacement: 398 cm&sup3;\n\t\n- Stroke: 82.00 mm\n\t\n- Clearance: 0.08 mm\n\t\n- Compression Height: 40.00 mm\n\t\n- Compression Ratio: 2-stroke (compatible with Wossner and OEM specifications)\n\n#### Component Details:\n\n\t\n- Piston Kit: 8264D100\n\t\n- Lock Ring: CW18\n\t\n- Pin: WP042\n\t\n- Ring Set: RSC8600 x2","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-77-78-yz400-8600-wossner-8264d100-yamaha-mx-77-78-it400","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/063e3d6aca4e:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/063e3d6aca4e: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."]}}