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RECTIFIER REGULATOR OVER CHARGING

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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.

Jan 28, 2016 | Garden

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Why wont 1977 sportsman charge its battery and i replaced everything related to this problem


By everything, I am assuming you mean the charge coils, regulator/rectifier and the battery? Then all you are left with is wiring. Bad charge coils means low or no output. Bad regulator/rectifier can mean either the regulator prevents the charge from getting to the battery or the rectifier is bad and dumping charge to ground or sending AC (Alternating Current) into the battery, which will kill it is short order. If there is no water in the battery or the plates are shorted, it will not accept a charge.

Oct 29, 2015 | ATVs

1 Answer

06 gsxr 600 stalled at a stop light and wouldn't restart, already replaced the battery and stator?


It sounds like its possibly a bad regulator/rectifier. I have posted a link to a video on how to test your regulator. How to test 2 plug Regulator Rectifier for K6 K7 GSXR 750 600 1000

Jul 12, 2014 | 2007 Suzuki GSX-R 750

1 Answer

My 99 xvl600 Honda transalp is overcharging the battery. I've tried changing thr reg/rect but it still boils battery?


A battery boiling dry is an indication that accessories have been added to the motorcycle incorrectly. If you add a radio or spotlights and attach the power wire directly to the battery, you bypass the voltage regulator/rectifier. The charging system can not regulate the charging system correctly and over charges the battery. If you want to add accessories you need to add them using a power wire past the regulator/rectifier so the charging system can properly regulate itself. Hope this helps.

Jul 28, 2011 | Honda XL 600 V Transalp Motorcycles

1 Answer

I have a 96 Honda CBR900RR and I have redone almost everything on it. I hooked the engine back up and the battery won't stay charged. It will stay charged until everything is running then it cuts off and...


the stator produces ac power which is rectified by the rectifier pack to dc power which is what the electrics uses
the voltage regulator controls the voltage to 14.5-14.8 volts dc
the voltage regulator by controlling the voltage also controls the maximum out put from the stator or the current being produced to charge the battery and run the lights and what ever else you have connected
hot stator and rectifier indicates uncontrolled out put so take it to an accredited bike electrician and have it fixed properly
have the battery load tested as uncontrolled output will boil a battery and ruin it

Apr 30, 2017 | 1995 Honda CBR 900 RR Fireblade

2 Answers

I have the 02 vfr800 and it keep killing batteries. i think the alternator is dying but others tell me it might be the rectifier regulator. does anyone have a way of testing either or both devices so i...


hi this might help,normally if the alternator/generater fails you will get no charge voltage at all,if your bike is fitted with an alternator(most later honda models are)then you will have a rectifier and regulator,the rectifier converts the ac voltage from the alternator to dc voltage which is then fed through the regulator and then onto the battery,if the bike is fitted with a generator then you will still have a regulator but no rectifier,a generator develops dc voltage at its source so a rectifier is not needed,a simple way to test the system is with a simple digital volt meter,these are very cheap and reliable and can be got for around 20 bucks,with the engine running at about 1500 -2000rpm test the voltage across the battery with the meter normall voltage at charge should be between 13.8 and 14.8 volts,if you are getting more that this then the regulator is faulty,another way to test the regulator is to slowly lift the engine rpm from idle through to about 3 or 4000rpm the voltage across the battery should not rise any higher than about 14.2-14.8 and it should reach its peak at about 2-2500rpm and not fluctuate more than about 1 volt across the rev range,if the voltage exceeds about 14.8 or fluctuates excessively with engine revs then the regulator needs to be replaced.hope this helps...cheers ian

Feb 06, 2010 | 2002 Honda VFR 800

2 Answers

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.

Jan 04, 2010 | 2002 Yamaha YZF Thunder ace 1000 R

1 Answer

I have a CBR 1000F 1993 it charges fine when


I had the same thing happen to my CBR1100XX..

Could be both the stator/alternator or the regulator/rectifier. I'd try replacing the cheapest unit (regulator/rectifier) first. Check if the insulation on the wires going to the regulator/rectifier look burned.

FYI most Hondas are prone to charging problems.

Sep 02, 2009 | 1993 Honda CBR 1000 F

1 Answer

Battery wont charge the battery is ok but during the day its like the bike is not charging the battery and the bike wont start i heard that the leads between the regulator to the battery could be worn,help...


The most common problem is the 3-wire connector being burnt between the stator and regulator/rectifier. It has also been commonly reported that the regulator/rectifier and/or stator may need replacement.

Apr 24, 2009 | 1998 Honda VFR 800

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