It depends on where your nozzle is placed in the airbox, if it doesn't get a good spread then you will not build the numbers you are expecting, also bottle pressure and quality of the nitrous is important. I had a 41hp gain with a .036 jet on my dry kit before i traded up to the wet system. Evey bike will be a bit different but it sounds like you are running a .032 jet not a .036. If the A/F is good bump it up to the next jet size and don't worry too much about a couple of lost HP...