The SOHC/4 World Tour is in under way.
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Sorry but Hondaman's post in the thread referenced by ' bellcow ' is wrong......a black +12V would never go to a Green-with-red-tracer as it is a switched ground...i.e. it is a ground wire when in Neutral or some other switched condition..... sorry ,but my post of 1 jumper between two wires is correct if you really want to do away with the safety switch ( no start in gear or no start without clutch pulled if in gear, start as usual in N , starter engages any time you hit the button if by-passed )
With respect, the original posters question was concerning K3 wiring( actually up to K5 ) where the green/red was a switched ground...wait, no, K6,7,8 F1,F2, still a switched ground...even K0 ( light green/red )......green/red on the solenoid is also a switched ground..i.e. waiting for the trans. to be in N or the clutch to be pulled to send ground to the solenoid.....
If you unplug the SSU and remove it you can by-pass it's function by jumping the solid Green wire to the Dark Green/Red wire( there is also a light green/red ). That's it, your done........the starter will now spin whether your in gear or N or clutch is pulled or not... N light will still work when in N 'tho...........
The picture makes it very clear which wires are being jumped.I am restoring a bike now and have a new wiring harness and I wanted to make it all a 1975 wiring plan but right handlebar switches are very hard to find.I may have to do away with the starter motor safety switch after all.You cannot buy them anymore so I might as well get rid of it.Thanks for you help and patience.BTW...What YEAR CB750 did you do this jumper wire modification on? Thanks.
When you unplug the SSU you are left with a red multi pin connector, you make a jumper wire to go from the green/red to the solid green.If you don't have the SSU plugged into you harness use you wiring diagram to find this red connector.Let me know if you want a pic.