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voltage output trouble!?

  • Thread starter Thread starter jwinter272
  • Start date Start date
J

jwinter272

Guest
my gs 750 is not making any volts threw the stator.

i got 1.3ohms on all 3 wires

and the only put out 2v at about 1500rpm

i thought the stator was bad so i bought a brand new one. after the install i get the same readings.

can the flywheel magnets go bad?
 
What year is your 750?

Early ones had 12-pole stators, newer ones have 18-pole stators.

They are NOT interchangeable.

.
 
its a 1978 8v and no i didnt throw it out i still have it

yes im using a multi meter
 
OK, your '78 should have a 12-pole stator in there. If you did not specify a 12-pole as your replacement, you probably got one with 18 poles.

Mixing them like that will give exactly the symptoms you are describing: no output.

Unless you have a picture of your new stator, you will have to remove the cover and inspect the stator.

Good news, though, if you lean the bike to the right a bit, you do not have to drain the oil before removing the cover.
Just put a 2x4 under the left leg of the center stand, the bike is still plenty stable.

IMG_7677.jpg


IMG_7679.jpg


.
 
12 Pole stators are hard to find...
YOU DID CHECK the voltage on the AC scale
 
Yes I check with the ac setting. I get about 2v at about 1500rpm. I'll have to check the stator when I'm back in town. I did have to change the flywheel due to the stater clutch breaking apart and blowing threw the side cover. I replaced it with a gs 550 flywheel. I was told it was the same as the 750 it was the same size and fit fine. Could this be an issue.? Thanks for all the replys!
 
jwinter272 said:
Yes I check with the ac setting. I get about 2v at about 1500rpm. I'll have to check the stator when I'm back in town. I did have to change the flywheel due to the stater clutch breaking apart and blowing threw the side cover. I replaced it with a gs 550 flywheel. I was told it was the same as the 750 it was the same size and fit fine. Could this be an issue.? Thanks for all the replys!
Click to expand...

Which year 550 flywheel?

And is that when your charging problems started?
 
I believe it was from a 79 gs550. Last year the starter clutch broke and blew threw the side cover also cracking the crank case. So over the winter I restored the whole bike and rebuilt the motor with replacement cases. It runs fine and and all electrics works beside the stator putting out. The bike charged up fine prior to the breakage.
 
This really has me stumped. It's a very straight foward system. Is there some type of grounding point i should look for? Can flywheel magents loss there magnetic pull?
 
Was the rotor replaced at the same time as the engine cases were?
jwinter272 said:
I believe it was from a 79 gs550.
Click to expand...

It's a simple system. Take a voltmeter, put it on A.C. and check the voltage directly off the stator.
 
Yes. I replaced the flywheel the same time I did the cases. I check the out put on the ac setting and only get no more then 2v
 
OK, so you might have replaced your 12-pole rotor magnet with another 12-pole magnet.

There is still no report on the number of poles in the stator.

My money is still on that point.

.
 
One or the other is incorrect.

jwinter272... time to open her up once again.
 
Okay, you never said specifically how you tested the stator output and got 2 volts, and nobody asked, so I 'll ask now. Very specifically, how did you test the stator? Unless you put your meter on two of the three stator leads and measured AC volts, you did it wrong.

If you put the meter on one wire and the other on ground, that's wrong. If you're reading DC, that's also wrong.
 
Generally when someone states they have tested the voltage output of the stator with the meter in the A.C. position and have measured 2 VAC output @1500 rpm eliminates one lead connected to ground and the other lead on a stator wire. Having the leads connected up like that results in a reading (negating bad meter design) of 0 VAC.

This negates the second question.
jwinter272 said:
Yes. I replaced the flywheel the same time I did the cases. I check the out put on the ac setting and only get no more then 2v
Click to expand...
 
He's asking for help. Unlike you, he doesn't know everything.

It's unlikely that he would read 2 volts AC on all three phases of the stator if he read them correctly. Possible: yes. Likely: no.

So I asked him to clarify the point. How about letting him answer?
 
i tested the stator with both the meter leads on 2 of the yellow wires.and tested all 3 in diffrent combos. iv done this many times on other bikes with proper readings. and yes the meter is on the ac scale. i checked the new and old stator and both are identical 12 pole. the flywheel has 3 sets of magnets? i will post pics once i fugure out how too:lol:
 
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