New 3 phase voltage regualtor

[82Suzie]

I'm in the process of replacing the stock voltage rectifier on my 1982 GS750E with a new and improved unit. See the difference in fin size and wire gauge. I have pre hooked up the unit and ran the motor and everything worked. Voltage at 3,000 rpm was 13.66. Now I have to trim the wire down to fit.
It seems to just fit into the space left by the stock unit and that's all I need.

[Nessism]

The Compufire is a good unit. Be sure to run your stator wires straight into the R/R, bypassing the stock harness. Also, make sure you run the ground back to the battery and check for voltage loss along your power output wire circuit on the way to the battery. If you are losing more than .25 volt on the way to the battery you have issues there. Oh, and your system should put out 14.5 volts, or near, at 5000 rpm. Any less suggests either poor wiring or a weak stator.

[Steve]

Hopefully you got the Compufire SERIES regulator.

They make more than one model, not all of them are the preferred series type.

(A Polaris regulator would have been a LOT cheaper.)

.

[posplayr]

Hopefully you got the Compufire SERIES regulator.

They make more than one model, not all of them are the preferred series type.

(A Polaris regulator would have been a LOT cheaper.)

.

Compufire only make one 3Phase and I think that is the correct one.

[Steve]

Compufire only make one 3Phase and I think that is the correct one.

OK. It has been a long time since I shopped for one, I thought there were more choices.

Doesn't matter for me now, as the Compufire has been pulled and replaced with a Polaris.

.

[posplayr]

OK. It has been a long time since I shopped for one, I thought there were more choices.

Doesn't matter for me now, as the Compufire has been pulled and replaced with a Polaris.

.

Been a while myself but IIRC, most all of the Compufire R/R's are single phase. The 3 Phase is the only one we would use on an GS.

[82Suzie]

Finished the installation today, got 14.36 volts at 4000 rpm, seemed good. I read somewhere in the past that the stock system ran hot, and my 82 GS certainly has run hot in the past. Whether my oil temp gauge is accurate or not, it is certainly alarming to see the temp needle up in the 310 degree range on a warm day. So that was a major reason for the upgrade.
I took the bike on the freeway for a test ride, the weather was around 70 degrees. I rode into stop and go traffic, then when traffic cleared up I took her up to 75mph and stayed there for awhile. In the past that would have moved the temp needle to the upper portion of the gauge, but on this trip the needle stayed in the 260ish neighborhood. So far so good.

[posplayr]

Finished the installation today, got 14.36 volts at 4000 rpm, seemed good. I read somewhere in the past that the stock system ran hot, and my 82 GS certainly has run hot in the past. Whether my oil temp gauge is accurate or not, it is certainly alarming to see the temp needle up in the 310 degree range on a warm day. So that was a major reason for the upgrade.
I took the bike on the freeway for a test ride, the weather was around 70 degrees. I rode into stop and go traffic, then when traffic cleared up I took her up to 75mph and stayed there for awhile. In the past that would have moved the temp needle to the upper portion of the gauge, but on this trip the needle stayed in the 260ish neighborhood. So far so good.

Not sure why your GS750 runs so hot, but many 1100's have documented drops in oil temperature from running a series R/R.

Nessim might be along to say you are mistaken and should replace the R/R to make sure you are not mistaken.

http://www.thegsresources.com/_forum/showthread.php?161397-Compu-Fire-SERIES-R-R-Install

[82Suzie]

Seemed to be running cooler all week. I'm a happy camper now.