Get a Polco 12 volt cigarette lighter adaptor with battery
clips (part no 359.01) from your local automotive parts shop (Halfords
maybe). Cut off battery clips. Place the adaptor on the right side
of the battery where it will sit quite nicely. High resolution
picture is here (big
file).
Crimp a terminal connector to the negative wire and attach it to the
battery negative terminal (you can shorten this wire considerably). Use a
Scotchlock connector to the rear light positive feed for the positive wire
(this way the supply is only live when you have the lights on - which you
do all the time you are riding anyway, don't you).
Plug the lighter adapter for the GPS into this socket and tape the two together. Take off the left fairing and feed the wire under
the left side of the tank and use ties where appropriate and the existing
wiring clips already present. Take it up the steering tube on the front of
the frame and follow the clutch cable to the left grip. The last plastic
tie should be on the steering tube.
Use an elastic band (allows some free play) as the last tie on the base
of the ball which holds the ram mount (see the
previous page for fitting instructions for this). This should then
give you exactly enough left to connect to the GPS. Replace left fairing
... et voila.