{"product_id":"namura-size-b-piston-kit-for-ktm-50-sx-pro-jr-sr-mini-junior-std-bore-39-50mm","title":"Namura Size B Piston Kit for KTM 50 SX Pro Jr Sr Mini Junior STD Bore 39.50mm","description":"\u003ch2\u003eSize B Piston Kit for KTM\u003c\/h2\u003e\u003cp\u003eThis size B piston kit is for KTM 50 SX Pro, Jr, Sr, Mini, and Junior models with a standard bore of 39.50mm.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe Namura size B piston kit for KTM 50 SX includes a piston, rings, and wrist pin for rebuilding the top end. It is designed for KTM 50 SX variants with a 39.50mm standard bore. This piston kit restores compression and performance on KTM 50 SX engines.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eIncludes piston, rings, and wrist pin\u003c\/li\u003e\n\u003cli\u003ePrecision machined to 39.50mm standard bore\u003c\/li\u003e\n\u003cli\u003eHigh-quality alloy for durability\u003c\/li\u003e\n\u003cli\u003eSize B ensures proper clearance for stock cylinders\u003c\/li\u003e\n\u003cli\u003eDesigned for high-rpm minibike engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor KTM 50 SX Pro\u003c\/li\u003e\n\u003cli\u003efor KTM 50 SX Jr\u003c\/li\u003e\n\u003cli\u003efor KTM 50 SX Sr\u003c\/li\u003e\n\u003cli\u003efor KTM 50 SX Mini\u003c\/li\u003e\n\u003cli\u003efor KTM 50 SX Junior\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop end rebuild for racing minibikes\u003c\/li\u003e\n\u003cli\u003eReplacing worn or seized piston\u003c\/li\u003e\n\u003cli\u003eRestoring engine power on KTM 50 SX\u003c\/li\u003e\n\u003cli\u003eCompetition maintenance for junior classes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003efor KTM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e39.50mm STD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the difference between Size A and Size B? \u003cstrong\u003eA:\u003c\/strong\u003e Size B is typically .01mm larger than standard; use if cylinder has slight wear. Measure your cylinder to confirm.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is the wrist pin bearing included? \u003cstrong\u003eA:\u003c\/strong\u003e The kit includes wrist pin but not the bearing; order separately if needed.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":44888495587414,"sku":"SZ1F09546","price":87.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_86b515e0-c8f5-4c96-a50c-00340d35a73d.jpg?v=1781094395","url":"https:\/\/www.solidspare.com\/products\/namura-size-b-piston-kit-for-ktm-50-sx-pro-jr-sr-mini-junior-std-bore-39-50mm","provider":"Solid Spare","version":"1.0","type":"link"}