Does the key switch actually carry all the current or is there a relay that switches the current?
For the starter, i is the solenoid relay that the battery cables are atteched to. For the rest of the loom feeding all the other circuits it all goes through the ignition switch.
I had a problem just here on my 750, traced to a dodgy ignition switch...the lock was fine, but on the switch underneath it was something crazy like 300 Ohms resistance. Get a meter and check your resistance or try 'hot wiring' the block connector that goes to the switch.
If you look at the wiring loom there is a box diagram showing the ignition switch connections.
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
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