Dehydration is a constant concern when it comes to riding in warm weather. As a rider, you're going to sweat in response to the heat and physical activity of riding a motorcycle, and you must replace lost fluids throughout the ride. Don't wait until you feel thirsty, dizzy, dry-mouthed or experience any of the other warning signs of dehydration before taking a drink.
Many riders travel with some sort of hydration bladder -- a backpack-style reservoir that connect to hoses and allows a journeying motorcyclist to drink without using his or her hands. You can fill the reservoir with water, ice or sports drinks. Avoid beverages with caffeine or alcohol, which are diuretics and cause further dehydration. A regular water bottle is a suitable alternative as well.