I've got one of these - £16 http://www.pcb-assembly.me.uk/motorbike-bis03m.php

Buzzer comes on at a custom time delay limit, but if you have the brake on, it cuts the buzzer (useful for junctions and stuff)


1972 4/4 4 seater, 1981 MGB GT
1984 Harley Davidson Electra Glide, 1990 Kawasaki ZX10