Hallo,
I just suffered the usual, annoying voltage regulator failure with the consequent fried battery. I already used a new unit from Ducati Energia (M900/916 non-original replacement, 130€, with adapted wiring) and I already did some circuit modifications (basically doubling the ground connections), but it was not sufficient to avoid the incident.
I begin to think that the problem is a poor air ventilation over the regulator that causes overheating. So I wonder if is it possible to place the regulator in a different position, for example on the side of the frame, like on some 907 (ie )
Does anyone have experience about this?

LC

I didn't apply the relay mod yet.
Indeed I measured that the "input voltage reference" line to the regulator is about 9V with engine running and lights on, so I suppose it's the cause of malfuncion: 3V are lost in the circuit and the regulator always is set to overcharge the battery...!
I thought to re-cable all the lines with 1,5 sqare mm cable but... are you sure that the relay mod is sufficient?

LC

I found something that I don't understand, I hope someone can help me.
According to schematics, Paso generator has 3 wires (green-green-red) and they go to the 3 plugs of the voltage regulator labelled as G-G-R. Is the red wire connected (or shorted) also to the red and pink cables that exit frome the rectifier on plug labelled B?
If yes, it means that one wire of the generator is connected to the positive (+) pole of the battery?
(I found my schematics not well readable about this)

Thanks,

LC

Ok, thanks!
My copy of the manual wasn't clear about this.

LC

I had confirmation about my doubts on the relay mod, but since this topic is about voltage regulator relocation, I'll move to "750 Paso Wiring Upgrade to Improve Starting" by jcslocum...

LC

:ugh: the voltage regulator is on the plate under the seat because
they use it as a heatsink for the cooling of it also i think it uses the
case as an earth . but you can only try the new position to see if
it works

Rodney