Top it off with coolant that says on the bottle that it is for use in ALUMINUM engines. This is a good one. Make sure all your antifreeze in your engine is this type.That would be your coolant reservoir. Top it of with a 50/50 mix if needed
Not agreeing or disagreeing but Ma Kaw has a special notice in the manual to check it cold.Um, don't "top it off" when the bikes cold. You'll end up overfiowing coolant on the ground. Go for a ride and check it after the bike heats up. Just make sure the level then is between the full and low marks.
Am guessing you never had a water-cooled bike before?