If the pump is up to pressure it does not
tick when you click the switch.
To check it is working disconnect the line running into the carbs and see if is pumping fuel up to the carbs by turning the switch on for 10 seconds at a time.
If it is not pumping it possible to bypass the pump and the bike will run while the tanks are between full and about 3/4 full.
If you need to replace the fuel pump along with facet etc that can be found here http://www.ktm950.info/how/wotf/wotf.html#FuelPumps
the fuel pump out an Africa Twin will go straight in.