No, it is not recommended to use 20W-50 oil in a 2016 KTM 350 SXF off-road bike. KTM recommends using specific oil grades for their motorcycles, and using the wrong oil can potentially cause damage to the engine or affect its performance.
The recommended oil for the KTM 350 SXF is typically a high-quality synthetic motorcycle oil with a specific viscosity grade, such as 10W-40 or 10W-50. It's important to consult the owner's manual or contact a KTM dealership or authorized service center to determine the precise oil specifications for your motorcycle.
Using the correct oil ensures optimal lubrication and protection for the engine, especially considering the high-performance nature of the KTM off-road bikes.