1000SP not charging

[colina]

ok gone through all the connections on my suprisa alternator and regulator ,getting about 13 volts only at 5000 revs .although this will probably be sufficient would have thought should possibly get a higher output .any suggestions thx ?

 

nb getting approx. 70acv out of the alternator.

 

[larue bones]

i have a bosch setup on mine. had trouble with charging. replaced regulator with adjustable one from moto international. u might want to contact EME at 303-526-0901  

[Kiwi_Roy]

"Suprisa alternator and regulator" means nothing to me, please give a year and model of the bike so I can look at a schematic.

 

There it is

 

My bike(s):
79 1000sp

 

These old 3 phase alternators can be difficult, start by inspecting the brushes

Clean up the ground connections, the others as well

Measure the Voltage across the regulator, how does that compare to across the battery?

Measure the Voltage at the live brush to chassis with the bike running

When referring to Voltage are you talking about the meter on the bike or a multimeter connected to the battery?

 

 

13 Volts while not exactly great it must still be charging.

[Kiwi_Roy]

My old California II has a similar charging system they are weak at best to the point when idling at the lights the headlight draws more than the alternators putting out. I replaced the regulator, little change

To boost mine I added a diode in the regulator sensing line, this boosted the Voltage by 0.6 Volts now it sits mid to upper scale on the dash meter but it still drops to the red zone with too much idling.