firstly , remove the speedo cable unit located on your front wheel , there is a bit involved in this , you've got to remove the wheel and axle , if you get that done (sounds more complicated than it is and it's always good to have some one help , two memories are better than one ) once you remove the unit , undo the small retaining screw , then remove the cable , if you have a cordless drill , insert the metal end of the cable into the drill and lock in , run your drill and check the speedo , if there is no movement , your cable is either boken or is not connected to the back of your speedometer .
other option is to remove your front fairing and check the rear of the speedometer, a great DVD is available called "FIX MY HOG" this gives a step by step video of how this is done , it also has other problem solving instructions . hope this helps .
cheers Yogi