well this is the way ive allways seen it done.
you get some copper tubing and mount that on the bike after the head set then you get some flexable tubing to put from your ultraflate to the copper tubing. if you have a uni filter just stab a hole in it with a screwdriver and put the copper tubing in the hole about a half inch from the mouth of the carb. dont put it striaght in or to close because you will damage your motor. it will work better to if you use like a nossle on the end of the copper tubing to get a finer spray. like a head off a mister like the ones you see at resturants.