It is not suitable for an alarm for a motorcycle (CRF1100L), even if I forget to turn it off, it is only when I get on the motorcycle that it starts to beep warningly. It is possible that the motorcycle is too softly suspended and heavy that movements with it are not detected by the alarm sensor. I have yet to get it to work by jerking the motorcycle. For a bike it should be ok, the battery only lasts about 4 months.