Locking helmet to the bike

[bri h]

I use a karabiner with a combi lock that i got from gear4bikers .com. it goes through the d rings of my lid and round the mirror stem or whatever . I cost a tenner and takes up no space under the seat. Probably not the most secure thing youll find but works as a deterrent as you have to dammage the helmet to get it of (if you dont know the combiation). its worth a look.