As if more proof was required... I just got a quote for a 2002 R1 worth 6 grand. With a Datatag it'll cost me around 800 quid fully comp[1]. Without a Datatag? £1700! £50 quids worth of tagging will get me £900 off my insurance. It even makes more difference than having it alarmed. With a Datatag and no alarm it's 800 quid. With an alarm its £750. [1] all quotes from H&R. BikeTeam are coming in a little cheaper, but their excess is £750.