Royal Enfield Classic 350 is generally recommended to use 15W50 grade engine oil. Liqui Moly 10W60 full synthetic oil may not be the best option for this motorcycle, as it has a different viscosity rating than what is recommended by the manufacturer.
For the Classic 350, it is advisable to use engine oil that meets the specifications of API SN Plus and JASO MA2. These specifications ensure that the oil provides the necessary lubrication and protection for the engine.
To determine the best engine oil for your Royal Enfield Classic 350, it is always recommended to refer to the owner's manual or consult a Royal Enfield dealership. They can provide you with the most accurate and up-to-date information regarding the recommended oil grade and specific brands that are suitable for your motorcycle.