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New generator not charging

  • Thread starter Thread starter robinjo
  • Start date Start date
R

robinjo

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I have a '85 GS1150 in my workshop from a guy I know, the reason it's here is because the carbs needed setting up and the steeringhead bearings changed but as allways more problems arise once you get to work on the old girl... including a front sprocket locknut lying on the bottom of the sprocket cover! :shock:

But that is now all taking care off, now it turns out it wasn't charging the battery, no higher voltage as rpm's rise just a slowly draining battery. Took the generator wires off the R/R unit and measured AC current, according to the manual it should give about 70 to 80 volts, I got 0.2v @5K rpm.

Ordered a brand new generator at Carmo, already got on off of them for my girls 550 and it works flawlessly, put it on the 1150 and measure voltage again, same results as with the old genarator!:?
checked my multimeter on a good bike and it measures correctly, tried another meter to be sure with the same results.

Checked the resistance between the three wires, 0.8 Ohm
Checked for continuity betweem wires and earth, indefinate
Checked each wire from the coils to it's end for resistance, 0.5 Ohm
Checked for burnmarks, none, still as new, been on the bike for 15 miles.

Rotor seems undamaged, it's magnets are all in one piece.

The old generator also looked fine btw, not burned and 0.9 Ohm resistance.

I don't have a clue :-s what the problem could be, suggestions needed and highly appreciated.
 
I know this sounds basic, but, Check to make sure the R/R is grounded. I just put a new engine in mine and left one small ground wire unattached. As soon as I hooked it up I had my charging system. Then again, I also had 75 vAC accross the stater.
 
Make sure you are checking the stator for AC voltage with it disconnected from the regulator
 
ihalterman said:
I know this sounds basic, but, Check to make sure the R/R is grounded. I just put a new engine in mine and left one small ground wire unattached. As soon as I hooked it up I had my charging system. Then again, I also had 75 vAC accross the stater.
Click to expand...

I am talking about measuring AC voltage straight from the generator, it is not connected to the R/R.
 
SqDancerLynn1 said:
Make sure you are checking the stator for AC voltage with it disconnected from the regulator
Click to expand...

I am indeed checking it with the R/R unhooked.
 
If we assume that the coils have been hooked back up in series after your end to end ohm reading test, and the ohm readings as you described are correct and you were testing the AC output of the stator with the volt meter on the AC voltage scale and not DC and that the stator is bolted in right, everything being ok leaves only the magnets themselves. In your description of the problem you say the magnets are all in one piece, but how strong are they? If they have lost their magnatism, you won't get much output. If everthing else is ok and wired right, as you said it was, there's not much else it CAN be but the magnets themselves. My magnets are strong enough that it takes quite a strong pull to unstick a steel screw driver from them, try testing the magnets themselves.
 
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