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  1. Consult the owner's manual: The first step is to refer to your Royal Enfield's owner's manual. The manual usually provides specific recommendations regarding the viscosity and type of engine oil suitable for your motorcycle.

  2. Choose the right viscosity: The viscosity rating, such as 10W-40 or 20W-50, indicates the oil's thickness and performance at different temperatures. Consider the climate you ride in.

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