Slash Five Charging Voltages
These measurements were taken on a '73 R75/5, after staring it with the electric starter, then riding it for a few minutes.
The charging system was recently checked for corroded connections, and one was cleaned, as it showed some signs of corrosion.
All RPM measurements were taken using the tiny, semi-reliable factory tach. Idle speed was too low to read on the scale, and 1000 RPM was hard to determine, as it was the lowest marked RPM, and the needle rested on the pin at this speed.
With the headlight on, the readings at idle and 2500 RPM were mildly surprising. Because of this, the measurements were made several times with the headlight on.
For information on how the charging system works, see the Bosch Charging systems page.