Question about Tamiya America Tamiya 112 Kawasaki Ninja Zx12r 112 Motorcycle Misb

2 Answers

Battery has a full charge, stator and regulator/ rectifier are new. After riding a short distance all gages go dark and only the tack is working. Then bike shuts down.

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  • highstreetsl May 20, 2011

    These steps have been preformed, but the proble still presists.

  • highstreetsl May 20, 2011

    Yes, but is fully charged from the beginning.

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It sounds to me your alternator has quit reason being if you run off the battery every thing is fine
once the battery runs down it quits and i really believe it is the alternator


hope this helps you
bob

Posted on May 20, 2011

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Check your charging system. With the engine running at about 4000 rpm, a volt meter across the battery terminals should read around 14 to 14.5 volts and drop to about 13.8 volts with the engine at idle. If this does not happen, the charging system may be defective. Even with lights on the voltage should climb, but will drop lower at idle. If this assists you please rate the solution, if you still have a problem, please come back to me.

Posted on May 20, 2011

  • Hans Pearson
    Hans Pearson May 20, 2011

    Is the battery flat when everything shuts down?

  • Hans Pearson
    Hans Pearson May 20, 2011

    For a battery to go dead on you like that there must be a serious short circuit when the ignition is switched on. With the ignition switched on you need to put an ammeter between the battery and the cable, but it is has to be a pretty big ammeter because the current flow could be high. If you do get a high reading, you will have to go through the machine circuits to find the short and see what is draining the battery. Look at things like the starter and its solenoid, things that normally have a high current draw, anything else in the system drawing such a current would probably burn the wiring or blow fuses.

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Where is the rectifier located on an unidentified mower/tractor?


It the machine has a rectifier it is built into the voltage regulator on the engine. It is considered a regulator/rectifier which both changes the AC voltage from the stator or alternator into DC voltage and then regulates the charge going back to the battery.

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Changed out regulator/rectifier and stator today both brand new new battery still dies or drains out during a short ride?? I'm lost now


You need to check the voltage on the battery while the engine is running. If it's less than 14volts, then the charging system isn't working at all, and that's how you test it. Don't just replace parts, test until you find what's bad. It may be as simple as a broken wire.

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Hi, yes you have either a faulty stator or regulator/rectifier. Check if you have ac voltage out of the stator to the regulator if so the reg is bad, if not the stator is bad. Regards Phil.

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On my 2000 zx12r my battery drains and bike shuts down while riding. Battery is new stator rebuilt and used regulator. What could be still causing this issue?


Hi,,,if your battery is not charging and you have a rebuilt staor,,then your regulator/rectifier is the cause,,its job is to charge the battery.

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I have a 2000 fatboy stopped to get gas battery was dead charge battery went bought new battery after 1 hr of riding battery was dead again is this a voltage regulator or a stator problem how do I check


Hi,
To check if you got a charging fault, get a multimeter and switch to voltage put across the battery. You should be getting at least 13.4 volts.
Turn lights on and this should fluctuate upwards. If your getting anything lower then what I stated you have a charging problem. Rectifiers and regulators can only really be tested of the bike with a specific tester. Hope this helps, let me know how you get on.

Jason

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My battery wont charge and I just bought it


Hi and welcome to FixYA,

Two possibilities:
  • rectifier / regulator combo (most likely);
  • corroded, burned, loose connection from the stator to the regulator (likely);
  • faulty stator (least likely).
The stator would be producing relatively high AC voltage while revving the bike. The stator output AC voltage are fed to the rectifier / regulator through 3 white wires. Check calls for testiing for the presence of the AC voltage on any pairing of the white wires before and after the connector before the voltage regulator. Check on the regulator calls for checking the battery voltage when revving the bike (14.5 VDC).

Good luck and thank you for asking FixYa.

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Sounds like regulator/rectifier, stator, or charging rotor.

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1 Answer

Overcharging battery!?


If it goes over 17 then there is definitely a regulator fault, regardless of what the stator is doing. The very purpose of the regulator (it 'regulates' the voltage within limits) is to NOT allow the output dc voltage to climb when the stator output rises (normal) with increased engine rpm. In other words - by nature of way it works normally, the stator AC output Voltage will rise as the engine rpm increases - it will continue to rise all the way to peak engine rpm. The Rectifier/ regulator with its double-barrel name performs two functions: the first - rectifier - converts the AC output of the Stator to DC volts - if 'UN-regulated' the DC volts would also climb proportionally to engine rpm. But that is where the second function of the Rectifier/Regulator - the Regulator - comes in. The Regulator's job is to stop the voltage rising over a certain threshold even if the stator is trying to drive it higher. It does this by 'shunting' current to ground (short circuit effectively) in a series of pulses; this controlled operation is called regulation. The limit is going to be 15V absolute max and more typically 14.5 or so. If the output rises about this value then it absolutely is NOT regulating. Failures of the regulator where they simply don't regulate and allow full voltage to pass are rare (but not impossible) - much more likely to be short or open circuit, neither or which would give the symptom you have. It still sounds almost like you maybe wired it incorrectly? The stator is inside the left crancase cover - whether or not it has its own problems, have nothing to do with the lack of regulation causing battery volts to go to 17V.

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