{"product_id":"rotax-max-balance-shaft","title":"3. 237948 Rotax Max Balance Shaft","description":"\u003cp\u003eThe \u003cstrong\u003eRotax Max Balance Shaft\u003c\/strong\u003e (R.237948) is the OEM counter-rotating shaft that cancels primary engine vibration on all Rotax 125 MAX EVO engines. Driven by the Balance Gear 50T (R.234435) at crankshaft speed, the balance shaft carries an eccentric weight that produces an equal and opposite force to the piston's reciprocating mass, dramatically reducing engine vibration at racing RPM. A damaged or bent balance shaft causes severe engine vibration, accelerated bearing wear, and can ultimately damage the crankcase bearing bores if left unaddressed.\u003c\/p\u003e\n\u003cp\u003eCompatible with all Rotax 125 MAX EVO variants: \u003cstrong\u003eRotax 125 Senior MAX EVO, Junior MAX EVO, Mini MAX EVO, Micro MAX EVO\u003c\/strong\u003e. Requires the balance shaft bearings (from Ch. 1), Balance Gear 50T (R.234435 ×2), and O-Ring 18x3.5 (R.430460) for installation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e R.237948\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Rotax 125 Senior MAX EVO, Junior MAX EVO, Mini MAX EVO, Micro MAX EVO\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCMC Karting stocks the balance shaft alongside all drivetrain gears and the complete Rotax 125 MAX EVO engine rebuild parts.\u003c\/p\u003e","brand":"KSG\/Karting Solutions Group","offers":[{"title":"Default Title","offer_id":48168084832477,"sku":"R.237948","price":99.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/cmckarting.com\/products\/rotax-max-balance-shaft","provider":"CMC Karting","version":"1.0","type":"link"}