{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"05c7b17a8d4d","name":"PISTON KIT XR400 TRX400 89.00, FORGED WOSSNER 8604D400","sku":"56-W4606+400.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":182.86,"formatted":"£182.86"},"summary":"Wossner forged piston kit with an 89mm bore. This high-performance piston enhances strength, heat transfer, and durability. The elliptical design ensures uniform bearing surface distribution, reducing localized pressure and preventing piston collapse. Features forged construction for superior strength and durability, optimized heat transfer to cylinder walls, elliptical design for uniform bearing surface under heat expansion, increased compression ratio for improved engine performance, and is made in Germany. Specifications include a bore of 89mm (88.94mm actual), display of 397 cm³, stroke of 70.00mm, clearance of 0.06mm, Wossner Compression Ratio of 11.00:1, OEM Compression Ratio of 10.00:1, dome volume of +3.20 cm³, and compression height of 26.20mm. Cross-reference OEM part numbers include Wossner Piston: 8604D400, Lock: CW20, Pin: WP052, Ring Set: 890XSY, and Rod: P4021.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"89mm"},{"label":"Variant Id","value":"255777"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4606_2B400_2EWO/194560de560af9f7.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4606_2B400_2EWO/194560de560af9f7.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4606_2B400_2EWO/55ed0412b3fded22.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4606_2B400_2EWO/5a195906c9ed551a.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4606_2B400_2EWO/f05d2ec608f47479.jpg"],"description":"Wossner forged piston kit with an 89mm bore. This high-performance piston enhances strength, heat transfer, and durability. The elliptical design ensures uniform bearing surface distribution, reducing localized pressure and preventing piston collapse. Features forged construction for superior strength and durability, optimized heat transfer to cylinder walls, elliptical design for uniform bearing surface under heat expansion, increased compression ratio for improved engine performance, and is made in Germany. Specifications include a bore of 89mm (88.94mm actual), display of 397 cm³, stroke of 70.00mm, clearance of 0.06mm, Wossner Compression Ratio of 11.00:1, OEM Compression Ratio of 10.00:1, dome volume of +3.20 cm³, and compression height of 26.20mm. Cross-reference OEM part numbers include Wossner Piston: 8604D400, Lock: CW20, Pin: WP052, Ring Set: 890XSY, and Rod: P4021.","descriptionMarkdown":"### Wossner Forged Piston Kit 89mm for XR400 TRX400\n\nUpgrade your motorcycle or ATV engine with this high-performance Wossner forged piston kit. Engineered in Germany for superior strength and durability, this piston is designed to enhance your engine's performance and longevity. The advanced forged construction offers improved heat transfer to the cylinder walls and increased resistance to wear.\n\nFeaturing an innovative elliptical design, this piston ensures uniform bearing surface distribution, even under extreme heat. This reduces localized pressure points and effectively prevents piston collapse, leading to a more reliable and powerful engine operation.\n\n**Key Features:**\n\n \n- Forged aluminum construction for exceptional strength and durability.\n \n- Optimized heat dissipation for efficient cylinder wall cooling.\n \n- Elliptical piston skirt design for balanced load distribution and reduced wear.\n \n- Increases engine compression ratio for enhanced power output.\n \n- Precision manufactured in Germany to exacting standards.\n\n**Specifications:**\n\n \n- Bore Size: 89mm (88.94mm actual)\n \n- Displacement: 397 cc\n \n- Stroke: 70.00mm\n \n- Piston Clearance: 0.06mm\n \n- Wossner Compression Ratio: 11.00:1\n \n- Dome Volume: +3.20 cc\n \n- Compression Height: 26.20mm","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-xr400-trx400-8900-forged-wossner-8604d400","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/05c7b17a8d4d:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/05c7b17a8d4d: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."]}}