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1982 GS850G - Compufire R/R and Caltric Stator install

  • Thread starter Thread starter growler
  • Start date Start date
The problem with ground it there is that you then need another wire to go from the battery box to your SPG. Too many connections, use as few as practical.

You will still need a modest-size wire from the battery box to the SPG so that your starter solenoid works, as well as the accessory terminal (the screws at the bottom of your fuse box).

.
 
Did a little dismantling this evening. Definitely have to clean up the battery box and repaint it while I'm doing this other work. Couldn't get the fuse box/starter solenoid bracket off the battery box. Soaked those screws with PB Blaster and will try again tomorrow.

I *think* I understand what you are saying Steve. I will read up on the SPG posts and comments that Posplayr has made and maybe it will finally click.

I am concerned with where to mount the r/r. It's about double in height as the original r/r, and I'm worried about swingarm clearance.


A few pics because why not?

B69504EC-25A8-4CBB-823A-8646E3007D2A_zpsqxsasd22.jpg


8FEB78B9-4135-4E84-8172-E8577E9B869A_zpsylilieb1.jpg


1AA2E3C7-FE4E-49B2-9291-B486C1FBB9BD_zpssuwxbanj.jpg
 
It fit under the battery box on my wife's 850L. Yeah, there wasn't much room left, but it fit.

You have a hand impact wrench? That will remove those pesky screws rather quickly, but you will need something to brace the inside of the box to withstand the hammer impact. :oops:

Good to see that you found the easy way to install the R/R: remove the battery box. :encouragement:

.
 
Yes I have a hand impact wrench. Plan on using it to remove those screws. :)

I guess I'll temporarily mount it to the bottom of box and reattach it. Then sit on the bike and jump around a bit - see if it touches the swingarm. I'd hate to get it all wired up and have there be an issue.


Steve said:
It fit under the battery box on my wife's 850L. Yeah, there wasn't much room left, but it fit.

You have a hand impact wrench? That will remove those pesky screws rather quickly, but you will need something to brace the inside of the box to withstand the hammer impact. :oops:

Good to see that you found the easy way to install the R/R: remove the battery box. :encouragement:

.
Click to expand...
 
Got a little work done yesterday. Battery box was cleaned up and repainted. Forgot to snap a pic of that. Will take one once I get the R/R mounted.

Things went smoothly for the most part. Had to take the impact to one screw that held the big tab protecting the stator wires inside the cover. That didn't work so I got out the dremel and cut a line down the middle so I could get in there with a regular impact bit vs phillips. She finally budged after that. New stator went in fine. I don't like how it doesn't have the black protection sleeve over the wires that come through the secondary part of the housing so I'm going to add some. I got this far and realized I had every OTHER replacement gasket EXCEPT the stator cover gasket. :fatigue: Got one ordered from Z1 and will continue once it arrives. In the meantime this week I'll cut off one of the R/R mounting tabs on the bottom of the battery box and weld it in the correct spot to hold the Compufire. Then test fit to make sure the swingarm doesn't hit it and then onto to wiring everything, the most daunting part of this for me. :)

Side note: about one pint of oil came out after removing the stator cover. That's taking cover off and letting it drip while I worked on other things. I did not drain the oil before starting. Bike was on center stand. I know some folks said only a little bit comes out, etc. This was my experience.

602333C4-CF82-443C-A28A-46056FF43D90_zpsnwx9ddgl.jpg


D91DF524-22CF-4572-A40A-E2F788A4946E_zpsn2pa4i7b.jpg


D2A2AC08-0F43-48F9-BA3B-4A1A7A1114B7_zpsc34zmfar.jpg


DC8B2456-DABA-45EE-B6BC-546D08949B52_zpswvb4qd30.jpg
 
Last edited:
looks good !

What was the reason to do this - just preventive good maintenance or issues with the stator maybe ?
Looks like clean brass wires on old stator yellow wires where they were clamped, must have shorted ??
 
Rijko said:
looks good !

What was the reason to do this - just preventive good maintenance or issues with the stator maybe ?
Looks like clean brass wires on old stator yellow wires where they were clamped, must have shorted ??
Click to expand...

stator is fried.
 
You got that right. I used Posplayr's signature to guide me through why my battery was not charging. Did the quick test, then tested my stator.

Replacing the stator and r/r to get the charging system good to go.

posplayr said:
stator is fried.
Click to expand...
 
More progress today. One mounting tab for the R/R underneath battery box was cut, relocated and welded in the new position to accommodate the Compufire.

Stator gasket arrived yesterday from Z1, so I finishing wiring the stator and got the cover back on with allen head bolts from the Z1 bolt pack. New connector wired to stator wires and ready to plug into the Compufire.

Now I am stuck with grounding questions. I want to do this correctly. Sorry for my ignorance here, just want to complete this correctly. Shot this little video below with my questions. Visuals always help. :)

https://www.youtube.com/watch?v=wxdV-o8o5m8

NOTE: a couple times I say stator when I mean R/R....it was a long afternoon. :p
 
Last edited:
Can I use primary wire for my SPG? I think I have some 10 gauge in my garage.
 
14 ga from spg to r/r(-) less than 1 ft
16 ga on everything else any length
 
We have liftoff.

Just have some cable maintenance to do in order to get everything tucked away as pretty as possible.

Repeated the quick test after repairs.

1.) key off................12.9 volts

2.) key on (but not cranking with lights for 10 sec)...12.4 volts

3.) at idle (1500 rpm).....13 volts

4.) at 2500 rpm 13.8 volts
​
5.) at 5000 rpm.....14.4 volts

6.) key off.....13.1 volts

Thanks to everyone for the feedback and help.
 
Also, my SPG currently has two wires connected to it. The ground from the R/R, and a short 14 ga wire that connects to the battery (-).

I wanted to connect the harness ground to it as well, but the existing wire with ring terminal were a tad too short and I didn't want to stress the wire. I will add a little length to it soon and also add it to the SPG.

As far as battery connections, on the (-) I have the 14 ga wire from the SPG, ground from the rear bottom of engine, and the harness ground that wouldn't reach my SPG.

On the positive side of battery just one connection to starter solenoid.

Can't wait to ride this week!!!
 
growler said:
We have liftoff.

Just have some cable maintenance to do in order to get everything tucked away as pretty as possible.

Repeated the quick test after repairs.

1.) key off................12.9 volts

2.) key on (but not cranking with lights for 10 sec)...12.4 volts

3.) at idle (1500 rpm).....13 volts

4.) at 2500 rpm 13.8 volts
​
5.) at 5000 rpm.....14.4 volts

6.) key off.....13.1 volts

Thanks to everyone for the feedback and help.
Click to expand...

Looks great, you must have cleaned the fuse box :)
 
growler said:
Also, my SPG currently has two wires connected to it. The ground from the R/R, and a short 14 ga wire that connects to the battery (-).

I wanted to connect the harness ground to it as well, but the existing wire with ring terminal were a tad too short and I didn't want to stress the wire. I will add a little length to it soon and also add it to the SPG.

As far as battery connections, on the (-) I have the 14 ga wire from the SPG, ground from the rear bottom of engine, and the harness ground that wouldn't reach my SPG.

On the positive side of battery just one connection to starter solenoid.

Can't wait to ride this week!!!
Click to expand...

I generally would not make the SPG to R/R(-) longer than 1 foot, but if making it longer allows you to pull all ground to the SPG I would do it. If the length is a concern then go to 12 ga for the wire instead of 14.

That said, the SPG to battery is more important that the harness ground as long as you have less than 0.250V on the harmness ground that will be fine. For the battery wire you want less than 0.050V
 
The SPG to R/R(-) is about 16 inches or so. It is 10 ga wire, what the Compufire ground wire is made with.

posplayr said:
I generally would not make the SPG to R/R(-) longer than 1 foot, but if making it longer allows you to pull all ground to the SPG I would do it. If the length is a concern then go to 12 ga for the wire instead of 14.
Click to expand...
 
The 14 ga SPG to battery wire is about 4-5 inches long. I will measure the voltage in the next few days. I am busy dogsitting two dogs and working two jobs. :stung:

posplayr said:
That said, the SPG to battery is more important that the harness ground as long as you have less than 0.250V on the harmness ground that will be fine. For the battery wire you want less than 0.050V
Click to expand...
 
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