I suggest you sit down with a BIG sheet of blank paper and do a diagram of all the electrical components in roughly the correct locations and then using many different colour pens, draw up the interconnections. This will give you a really good idea of what you need to account for and what the eventual loom must look like. Do NOT make the mistake of using the bike frame as your earth path - the electrical flow through the swing arm and steering head bearings will eventually damage them. Run a god earth wire into the headlight shell and also into the RFM.
My experience is you will create a number of drawing before you come up with something you are really happy with .
Hi Martyn, from experience, the amount of current likely to flow through swing arm bearings is not likely to cause damage for a couple of hundred years BUT I still agree with running a separate Earth....while on the point of Earths, last week I was having intermittent problems with the Beemer....slow crank speed (even though I had just stripped and overhauled the starter motor) intermittent operation of ABS (which puts you into "hobble home" mode aka No
F#@kin Brakes), and another few intermittent problems.
All this after a big strip down to replace rear main seal (which destroyed the clutch) So, remove all Tupperware, Tank and everything else you could think of only to discover....
hadn't connected one of the Earths
Ya gotta love the ergonomic design of Beemers, 40 minutes of Tupperware removal just to remove radiator cap.
Was even worse on an ST1100 I had.....then the wind picks up (on side of road) 20 minutes chasing Tupperware across peak hour traffic only to find retaining screws, that were sitting in the removed plastic, had fallen in gutter, half of which fell into a drain (That will teach me for buying a Honda)
Kev