Join Date: Jul 2013
Location: Gatton, Queensland, Australia
It is a frequency changer used by something that is or was, installed on your bike. Perhaps a burglary alarm system. A frequency changer is used to prevent one person's deactivator from deactivating all nearby systems. Similar to a garage door opener opening all your neighbours automatic garage doors.
Just make sure that it is no longer connected to anything. If in doubt leave it alone.
2010 Weestrom; 2017 Kawasaki Versys-X300; 1988 Suzuki GSXR1100