is it the speedo or PP?
if its the PP check the connectors down by the paddlewheel...make sure they arent soaking wet, if they are you need to zip tie them up out of reach from water and let them dry out. If they aren't wet check the voltage of the green wire that goes to the display. While spinning the paddlewheel slowly it should alternate between 0 and 12 volts. When spinning fast it shoud read somewhere around 5 volts. If its reading right...it's a moomba problem. If it's not reading right...its more than likely the master module for the PP. you can call Gary at PP and he'll ship you out a new module, that way you dont have to mess with the dealer.
if it's the regular speedo...i have no idea and I just wasted alot of time...good luck