The Hondaman knoweth all.
Yes, indeed. Thanks to him I'm correcting a problem before happening. I did not know that the cheap ignition switch did not cope with the CB750 amp needed.
I bought 3 relays, wiring with relay holder, mini fuse holders, socket, pins.. today. I had 12V car relays from before but I noticed that the newer models are smaller that will be fine for the 2 relays for headlight. Maybe they can be inside the head lamp. 3:rd relay for coils under the CB750 fuse box.
These will be connected beside everything else possible to reconnect to OEM later. Head light will activate one relay each instead of the H4 bulb. Closing 12V direct from battery via 10A mini fuse close to battery.
Ignition via 3:rd relay. Wire from ign switch feeding the coils extended to the 3:rd relay, will activate 12v direct from battery via another 10A mini fuse to the coils.
I guess that the starter button will work as it is, right?