Electrical rewire-overhaul

[posplayr]

Wanted to add my 2 cents to this thread since it's one of the first ones that comes up on a Google search for SH775AA. I've been testing a bunch of these Shindengen regulators after retrofitting them to a number of bikes, and the difference I've managed to find so far is that there's a different voltage set point for each: (Note, these were all tested on the same day, same bike, same battery, same wiring, etc.)


SH775BA: 14.2V from 2000rpm to redline (3 samples tested, one brand new, two used - all identical)
SH775AA: 14.7V from 2000rpm to redline (2 samples tested, one brand new, one used - both identical)


Granted, I have a fairly limited sample set, but the trend is obvious and it makes sense given that the Shindengen part numbers are different. Shindengen does also note on their website that they will make these units custom for any OEM with whatever regulated voltage they want.


Your mileage may vary of course, as different bikes will have different voltage drops through the wiring, connectors, etc., but in particular if you're wanting to use a LiFePO4 (Lithium) battery in your bike, you might be better served getting the SH775BA - a little less voltage means a little less stress on the cells.

Nice work. Did you measure this at the R/R terminals? That would eliminate wiring differences.

 

[t2098]

Nice work. Did you measure this at the R/R terminals? That would eliminate wiring differences.

It was measured at the battery terminals, but all R/R units were tested on the same bike, so it was an apples-to-apples comparison at least (which is why I'm confident about the regulation set point being 0.5v higher)

My point about the wiring differences was more a caveat that just because I got 14.2/14.7v on my bike doesn't necessarily mean someone else will get those exact same voltages on theirs.

 

[posplayr]

It was measured at the battery terminals, but all R/R units were tested on the same bike, so it was an apples-to-apples comparison at least (which is why I'm confident about the regulation set point being 0.5v higher)

My point about the wiring differences was more a caveat that just because I got 14.2/14.7v on my bike doesn't necessarily mean someone else will get those exact same voltages on theirs.

If you measure at the R/R then the connection controversy is mute; there is none. While I grant you that there is likely a voltage difference in the R/R set points based on the difference you measure, you don't really know what that is to the certainly you quote because you measured at the battery you added that uncertainty.