1972 R75/5 Voltage to Ground Question
I'm a new member, so thanks in advance for replies.
I have a 1972 R75/5 Toaster. Can anyone tell me whether 13+ volts between the battery ground strap and the frame is normal for this bike? I'd like to know whether I should be looking for a wiring short. I was getting 0.56mA as well - but this disappeared after pushing/pulling the ignition "key" a few times. I've taken each turn indicator bulb and the rear tail-light bulb out, one at a time, and still get 13+ volts on the multimeter. Thanks.
Diode Board - Mounting Bolts Short the Battery?
I think I'm getting a clue to what's going on. I replaced the diode board a while back with one made by Wehrle (pic attached). While it looks identical to the original factory board, closer inspection reveals that two of the mounting holes are insulated with non-conductive washers (per my old one), while the other two holes include pressed-on metal washers that are attached to the chassis of the board. Since the positive wire from the battery attaches to a spade terminal on the diode board chassis - then as soon as the top two mounting bolts are inserted there's a direct connection between the positive side of the battery and the body of the engine. The old diode board had all four mounting holes insulated.
Has anyone else run into this problem on a 1972 R75/5 when replacing the board? I guess I could try and modify the top mounts?