Can any one out there give me a simply fix. I wish to run my GPS off the bikes 12 volt power thats no problem and I have bought a marine grade cigarette port with a cover plug etc which I have fitted to the left hand side of the fairing near the fuse area. Now all I need to know are which two wires or do I just need to bite into one? So I need to know which power wire when the igintion is on and earth the other to the bikes frame or to the fuse box. I would also use it for charging my mobile on the very odd occasion too

 

I've supplied power to two Powerlet outlets (BMW style) one on each side of the dash from a relay switched fuse box and ground block. I like using a relay to make sure that the device gets full power and it's not running through a switch. Also the added benefit of turning the device off with the key so you don't drain your battery if you leave it on accidently.
Heres how I wired it all up. Now to plug in new devices all I need to do is plug in a power to the fuse block and one to the ground block, and put in a fuse! I can connect up to six devices to the fuse block.
I like the Powerlet sockets, because of the secure connection. You can get a Powerlet to cig lighter adapter if so desired.