No. It's not like the cheap China bikes that are pre wired.
The easiest thing to do is add a motion sensor/DPDT switch.
Wire the switch to power the motion sensor which in turn will fire the horn on one side, and use the other side as an Ignition interrupt. A latching relay can be used to lock the horn on until you deactivate it but it's usually not needed to scare someone off. the whole deal costs less than a pack or two of smokes.
I can draw up an easy schematic for the wiring if you need one plus a parts list.
