The recommended tire pressure for the Royal Enfield Himalayan can vary depending on factors such as rider weight, load, and riding conditions. It's always best to refer to the owner's manual or consult with a qualified Royal Enfield dealer or service center to obtain the specific tire pressure recommendations for your particular model and setup.
As for the use of nitrogen instead of regular air for filling the tires, it is a topic of debate among motorcycle enthusiasts. Nitrogen is less prone to expansion and contraction due to temperature changes compared to regular air, which could potentially lead to more consistent tire pressure. However, the actual performance benefits of using nitrogen in motorcycle tires are often negligible for typical road use.
In general, using regular air for tire inflation is perfectly fine and is the standard practice for most motorcycle owners. If you prefer to use nitrogen, it is important to maintain the recommended tire pressure as specified by the manufacturer, regardless of the type of gas used for inflation.
Again, to ensure the best and most accurate information regarding tire pressure for your Royal Enfield Himalayan, I recommend referring to the owner's manual or consulting with a qualified Royal Enfield dealer or service center. They will be able to provide you with the specific tire pressure recommendations for your bike model.