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Posted by Troll
- September 19, 2015, 14:44:04 PMThe stator leg that showed low output is the culprit. The rotor would effect all legs, and since it's a permanent rare earth magnet, unless the magnet is broken/missing, it's probably going to be ok.
Posted by stein69
- September 19, 2015, 14:27:35 PMWith a good battery I was getting 12.7 volts above idle, high rpm above idle. Ran new ground to chassis from neg ground on the back of transmission. Tested AC out put at the three yellow wires while it was disconnected (troll suggested that in the beginning) and behold a reading I can definitely call bad. Max at high idle was 125vac. That's half what the book calls for. So my alternator is bad. Should I replace the stator or the rotor or both?
Posted by stein69
- September 19, 2015, 13:35:37 PMI just saw the idea about the ground and I will check that now! I hope that is it! I just put in the new battery it was 12.5 after autozone charged it. I don't have a tach but the voltage only went up .1 volt. I hope it's the ground!
Posted by DC
- September 15, 2015, 00:01:27 AMQuote from: aralph on September 14, 2015, 21:22:59 PMThis is the exact problem I had and needlessly went out and bought a new battery, before I discovered the real problem.Just throwing this out there, but have you ever checked the frame ground
to make sure it is tight and clean.aralph
Posted by aralph
- September 14, 2015, 21:22:59 PMJust throwing this out there, but have you ever checked the frame ground
to make sure it is tight and clean.
aralph
Posted by stein69
- September 13, 2015, 19:52:13 PMThanks guys. I have the battery on order and I will let you know the voltage test with a good battery when it gets in!
Posted by Troll
- September 12, 2015, 07:55:18 AMYuasa YUAM6220C YTX20CH-BS Battery will this fit under the seat???
That's what I have. Same size as the 16 but more power.
Posted by stein69
- September 11, 2015, 22:38:03 PM"Did you measure the a/c output with the engine running? What is the D/C voltage at the battery with the engine running? Should be 14.5 or so at idle. Mine goes to 15.2 @2000 rpm. see the instructions on page 15-29 about D/C and A/C output." -Troll. I did this with a dead battery. I jumped the bike to get it running and then after I took the bike for a spin around the block I pulled the seat off while it was running and tested it! Not good! I came up with 11.5-12 volts. Then I tried to restart it after I shut it down and nothing, just clicking. So I'm looking at new batteries on Amazon and should have one by Tuesday! If a battery is all that I need... well I'm glad I bought a Kawasaki! --Stein
Yuasa YUAM6220C YTX20CH-BS Battery will this fit under the seat???
Posted by greenbarn
- September 11, 2015, 18:49:00 PMQuote from: stein69 on September 11, 2015, 11:10:40 AMThe other answer to your question is - "yes" the dead battery (depending) can give you bad readings. Can't trust voltage readings when the battery is dead/bad. I've seen it a lot on cars- and assume the same is the same on bikes. The dead battery can be possibly taking all the current and your readings could be incorrect. Might want to install a good battery (you need one anyway, right) and retest....All of these read out good. So my stator and rectifier are good?? I still don't understand why my voltage while running is so low. The battery was shot when I did the voltage test. Would that suck up all my alternator voltage so I would be unable to read correct voltage?
Posted by Troll
- September 11, 2015, 13:59:33 PMDid you measure the a/c output with the engine running? What is the D/C voltage at the battery with the engine running? Should be 14.5 or so at idle. Mine goes to 15.2 @2000 rpm. see the instructions on page 15-29 about D/C and A/C output.
Posted by stein69
- September 11, 2015, 11:10:40 AMAll of these read out good. So my stator and rectifier are good?? I still don't understand why my voltage while running is so low. The battery was shot when I did the voltage test. Would that suck up all my alternator voltage so I would be unable to read correct voltage?
Posted by stein69
- September 11, 2015, 10:35:20 AMSo this is the stator test and resistance is high but good.
Posted by stein69
- September 10, 2015, 17:53:09 PMI'm working on getting a new battery. Tomorrow morning I'll be able to get into the stator and rectifier wiring to read them out.
Posted by 49Reo
- September 10, 2015, 13:42:18 PMPlease keep us posted on your findings. Good intel is good to have.
Posted by Troll
- September 10, 2015, 08:15:07 AMIt's a simple permanent magnet "delta" wound stator system. If the stator coil resistance checks good, there is little left but the rotor and the rectifier. Changing the parts is pretty easy. You'll need a gasket for the system cover, and what ever you decide to replace. This is not a whole lot different from the alt. system on a car.