A clandestine organised action or threat of action with ideological, political, ethnic or religious intentions, carried out individually or by a group, involving violence against persons or the economic value of a material or intangible property is wholly or partially destroyed, either to impress the public, to create an environment of insecurity or to put pressure on public authorities or to hinder the movement or normal operation of a service or an undertaking.
Terrorism is one of the main exclusions, your bike won't be covered in case the damage is caused by terrorism.