In Thailand you can buy a very wide range of alloy wheels, which will fit on a Honda Wave, and depending what you buy they will support tubeless tires or not.
Not sure if it's a good idea to change the wheel size on a Honda Wave, it will make the bike a bit lower but smaller wheels also make the bike more nervous and less stable to ride on a straight line.
i am thinking of getting racing boy alloys the next time i buy tires. i currently run 80/90, 17s. do these alloys support tubeless tires of the size indicated. also, is there a 15"alloy wheel for this bike? 9i would like to lower the center of gravity and make it more convenient for my little thai wife:)