Thanks Chuck & I assume that's our very own Kiwi Roy of electrical fame
I have a sensor for the back wheel that triggers off the disc bolts, originally for a digital dash but I changed my mind, hopefully it will work. The wiring for it has already been brought up to the front of the bike.
It's going to be difficult as it will probably all get wired upside down to a "chocolate block" which will take the spades off the existing loom. I do not want to start cutting the loom, so it will be a bit tricky.
Its not going to be as difficult as Rodekyll's but still a PIA and it's actually 7 lamps not 4, the speedo lamps will not wire themselves (unfortunately)