{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"0df07901ff54","name":"PISTON KIT 01-08 KTM50 SX, WOSSNER 8225DC FORGED MX","sku":"56-W803.C.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":83.92,"formatted":"£83.92"},"summary":"Wossner forged piston kit with a 39.52mm bore (+0.02mm oversize) is specifically engineered for KTM SX50 models from 2001 to 2008. Designed to deliver consistent performance in high-revving two-stroke engines, it features a precision-machined elliptical profile for even load distribution and superior durability. Manufactured in Germany, this piston is ideal for engines requiring minimal oversizing during rebuilds. Forged construction ensures enhanced strength and long-lasting performance. Optimised for effective heat transfer from combustion chamber to cylinder walls. Elliptical design minimises stress concentrations and prevents piston collapse. Made in Germany. Specifications: Bore: 39.52mm, Actual Bore: 39.47mm, Engine Displacement: 50 cm³, Stroke: 40.00mm, Clearance: 0.04mm, Compression Ratio: 2-stroke (Wossner and OEM), Compression Height: 21.60mm, Lock Part Number: CW12, Pin Part Number: WP101, Ring Set Part Number: RSB3950.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"257825"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W803_2EC_2EWO/498ee3d347e6c53a.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W803_2EC_2EWO/498ee3d347e6c53a.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W803_2EC_2EWO/26e0e4059b9835e0.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W803_2EC_2EWO/99ee2137d4ae5836.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W803_2EC_2EWO/06ff6c7ad085d8e2.jpg"],"description":"Wossner forged piston kit with a 39.52mm bore (+0.02mm oversize) is specifically engineered for KTM SX50 models from 2001 to 2008. Designed to deliver consistent performance in high-revving two-stroke engines, it features a precision-machined elliptical profile for even load distribution and superior durability. Manufactured in Germany, this piston is ideal for engines requiring minimal oversizing during rebuilds. Forged construction ensures enhanced strength and long-lasting performance. Optimised for effective heat transfer from combustion chamber to cylinder walls. Elliptical design minimises stress concentrations and prevents piston collapse. Made in Germany. Specifications: Bore: 39.52mm, Actual Bore: 39.47mm, Engine Displacement: 50 cm³, Stroke: 40.00mm, Clearance: 0.04mm, Compression Ratio: 2-stroke (Wossner and OEM), Compression Height: 21.60mm, Lock Part Number: CW12, Pin Part Number: WP101, Ring Set Part Number: RSB3950.","descriptionMarkdown":"### Wossner Forged Piston Kit 39.52mm Oversize for KTM 50cc\n\nUpgrade your KTM 50cc engine with this high-performance Wossner forged piston kit. Engineered for durability and optimal power delivery, this kit is designed for a 39.52mm bore, representing a +0.02mm oversize from the standard size. It is meticulously crafted in Germany to meet the demanding requirements of high-revving two-stroke motocross engines.\n\nThis Wossner piston features a precision-machined elliptical profile. This advanced design ensures even load distribution across the piston's surface, significantly reducing stress concentrations and preventing piston collapse under extreme operating conditions. The forged construction provides superior strength and resilience compared to cast pistons, leading to enhanced longevity and consistent performance, especially during demanding rebuilds where minimal oversizing is required.\n\n**Key Features:**\n\n \n- Forged Construction: Provides exceptional strength, durability, and resistance to wear for extended engine life.\n \n- Elliptical Piston Profile: Designed for optimised load distribution, stress reduction, and prevention of piston collapse.\n \n- Efficient Heat Transfer: Engineered to effectively dissipate heat from the combustion chamber to the cylinder walls, maintaining optimal operating temperatures.\n \n- Precision Manufacturing: Made in Germany to exacting standards for superior quality and reliability.\n \n- Oversize Application: Specifically sized at 39.52mm (+0.02mm) for engines requiring a slight bore increase during rebuilds.\n\n**Specifications:**\n\n \n- Bore Diameter: 39.52mm\n \n- Actual Bore: 39.47mm\n \n- Engine Displacement: 50 cm&sup3;\n \n- Stroke: 40.00mm\n \n- Piston Clearance: 0.04mm\n \n- Compression Ratio: Compatible with 2-stroke (Wossner and OEM specifications)\n \n- Compression Height: 21.60mm\n \n- Lock Ring Part Number: CW12\n \n- Piston Pin Part Number: WP101\n \n- Ring Set Part Number: RSB3950","weightGrams":null,"fitments":[{"make":"BETA","model":"RK6 50","cc":null,"notes":null,"years":"1997–2002"},{"make":"BETA","model":"ST 50","cc":null,"notes":null,"years":"1996–1999"},{"make":"BETA","model":"SUPERMOTARD 50","cc":null,"notes":null,"years":"1996–1999"},{"make":"KTM","model":"50 ADVENTURE","cc":null,"notes":null,"years":"2002–2008"},{"make":"KTM","model":"50 JR ADVENTURE","cc":null,"notes":null,"years":"2002–2003"},{"make":"KTM","model":"50 MINI ADVENTURE","cc":null,"notes":null,"years":"2002–2008"},{"make":"KTM","model":"50 MINI ADVENTURE GS","cc":null,"notes":null,"years":"2002"},{"make":"KTM","model":"50 SR ADVENTURE","cc":null,"notes":null,"years":"2002–2007"},{"make":"KTM","model":"50 SX","cc":null,"notes":null,"years":"2001–2008"},{"make":"KTM","model":"50 SX JR","cc":null,"notes":null,"years":"2006–2008"},{"make":"KTM","model":"50 SX MINI LC","cc":null,"notes":null,"years":"2001–2008"},{"make":"KTM","model":"50 SX PRO JR","cc":null,"notes":null,"years":"2001–2005"},{"make":"KTM","model":"50 SX PRO SR","cc":null,"notes":null,"years":"2001–2005"},{"make":"KTM","model":"50 SXR ADVENTURE","cc":null,"notes":null,"years":"2003–2007"}],"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-01-08-ktm50-sx-wossner-8225dc-forged-mx","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/0df07901ff54:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/0df07901ff54:1"}},"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."]}}