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When i rev my zx9r bmodel to 5000 revs my volt meter reads 15.6 is this correct or is my regulator rectifier messed up

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  • Motorcycles Master
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12 volt battery ....check its volts at crank
its correct
has to be that high
to have to ride short trips and still charge battery
or with with lights on all the time



When i rev my zx9r bmodel to 5000 revs my volt met - index-bwbjq1d2inqbxh534mfqkm1n-3-0.jpg

Posted on Apr 29, 2017

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How can I tell if my voltage regulator is working properly?


Hi Tom, for more information about your question please visit the website below. Good luck and have nice day.
Stock motorcycle regulator rectifier check out

Jun 08, 2015 | 1993 Harley Davidson FLSTF Fat boy

1 Answer

How can I check charging system in scooty pep+


The normal way is locate the battery, using a multi meter set to 20 volt DC check the volts across the terminals, if your battery is 12 volt the reading should be at least 12.5 and at most 13.5. If 6 volt the reading will be somewhere between 6.5 and 7.5 volts. Remove meter, start the engine, connect the meter back to the battery keep it set to DC and 20 volt. Note the meter reading at tick over and slowly increase the revs the voltage should rise to about 14.4 volts for a 12 volt system and maybe 8 volts for a 6 volt one. If volts to not rise then check regulator/rectifier, if OK check alternator.

Dec 23, 2014 | 2008 TVS Scooty

1 Answer

How do I check the stator and voltage regulator on my motorcycle?


Get a multimeter (you can get one from under $10).

Set the scale for D.C. Voltage, and connect it to the two battery terminals, observing polarity!

Start bike and read meter.
Should be around 13-14 volts.
It should rise slightly when you rev the engine.

If you don't get these readings, shut off engine, and disconnect wiring from alternator to regulator.

Set meter's scale to A.C. Voltage, and connect to alternator leads (polarity doesn't matter on A.C. Voltage).

Start engine and read meter.
Output depends on how high your alternator is rated.
I've seen it as low as 25 volts, and as high as 40 volts.
Whatever you get, it should rise when you rev the engine.

If the alternator isn't reading right, that's your problem.
If the alternator's reading right, but the output from the regulator isn't, then the regulator's the problem.

Usually, the regulator goes before the alternator does.

Aug 25, 2014 | 2002 Harley Davidson FXDL Dyna Low Rider

1 Answer

Triumph daytona 650 05 model having problems charging the old and new battery told it could be the rectifier /regulator how can I check


I have a good idea, this is if you change the batt and it did not charge try with a volt meter re on the + being red lead B- being minus set to dc volt set to 20 volt check charging system this being 14+ volt is the reading to getand also rev engine to moderet rpmto see if it drop slow or fastif it drops to 12 and below may be reg, now find the three like wire to the reg test for A/C volt 65 and higher at 5000 RPM that will also indecate reg that is if there are no burnt wire which will be see when you go to check the voltage readings. Have fun

Sep 30, 2011 | 2005 Triumph Daytona 650

1 Answer

Isuzu rodeo 04 loss power on hills will not rev above 2000 revs have checked fuel supplie ok


Take your altenator to AutoZone and have it tested. If the voltage regulator is defective, you might notice your volt meter running up over 14 volts. The extra voltage messes with the electronic shift and your car stays in high gear instead of downshifting.

May 16, 2011 | Isuzu Rodeo Cars & Trucks

1 Answer

I installed a shark audio amplifier on my bike. battery died.I tried a small trickle charger to recharge batt but somehow killed the charger.I disconnected shark amplifier and led lights, then bought...


it sounds like your charging system is out. use your volt meter check the battery charge before you start the bike, it should read about 12 volt, start your bike now, check you meter you should be running about 13.5 volts. rev your bike watch your meter it should spike around 14.5 if your meter jumps up over 15 your reg/rec is not working right, if it drops when you rev the bike you stator is not working. Its always best to replace them as a pair as they work as a pair and bad old part can kill a nice new pricey part if you follow what im saying. the stator is the coil winding that makes a/c power after its made it goes to regulator/ rectifier it's job is take that a/c power and make it d/c (you can only make a/c power and store d/c power) it also regulates the volts around 13.5. see what you got and let me know
hope this helps
M.Woodring

Apr 19, 2011 | kawasaki VN 800 Vulcan Classic Motorcycles

1 Answer

Battery keeps going dead. i can jump start my bike and it remains running. I charged the battery correctly and it is still not holding a charge. do i need a new battery or is it the recitifer?


The first thing you need to do is test your charging system. The easiest way to do this is by using a digital multimeter with the setting set on AC Volts, start the bike and connect the meter to the battery, the meter should read between 13-15 volts AC. rev motor a little and watch meter to see if volts go up it should. If the volts rise then your charging system is functioning properly. If the volts are less than 12 volts then you may need to take the bike to a shop to have further testing done by a mechanic to see if it is the stator or regulator/rectifier.

Nov 04, 2010 | 2004 Honda CBR 600 RR

1 Answer

I have a 1981 suzuki 750 .the battery goes dead afther one ride .where is the gentor ? how to keep battery charged as i i'm rideing ?


Your generator is on the left as you sit on the bike. The GS/gsx Suzukis do have issues with charging the battery.
1. Charge the battery.
2. Use a multimeter/voltmeter across the battery, do you get 13.5volts dc or more? You may need to rev the bike to 2-3000 revs.
3. If the meter just shows battery voltage, you need to check the regulator/rectifier unit. This will be under the side panel (usually left side) and will be a square metal unit with cooling fins. Check all the connections are clean and rust free, ncluding all the earth connections. Test your charging again.
4. If its still not charging, trace the 3 wires that come from your alternator and connect to your regulator. Disconnect them and use a meter to check between each of the 3 wires. You should get 60-90 volts AC. If not, you need new alternator windings. If you get the correct reading, you need a new regulator rectifier unit.

Aug 03, 2010 | 1981 Suzuki GS 750 L

1 Answer

Replaced battery, bike cranked, after riding 4 miles, just ticks


check battery leads (both ends) , Then make sure battery is charged 100% (verry important) Get out your (Digital) volt meter set it to DC volts Connect leads to the Battery, it should have at least 12.6 v , Watch meter and start engine, if meter drops below 10.0 volts your battery may be weak and will have to be replaced, or your starter is'nt mechanicaly efficient and will have to be fixed or replaced. While engine is running note voltage should be 12.6-13v volts, then rev engine to 3000 RPM , meter should read 13.5- 15 vdc. If not you have a problem with your stator or regulator/rectifier.

Jul 09, 2009 | 2006 Harley Davidson FLHR Road king

1 Answer

Bike shut down. found out battery was dead. replaced battery didnt last one hour before the new one was dead. whats my problem?


You have either got a bad generator (Stator) or wiring problems. Check to make sure all connections from Stator to Regulator and regulator to battery are good, Not corroided, or burnt. Check to make sure your Ground wire from battery to engine block it good! If all connections are good then the Stator is Bad! Testing the Stator is easy! With the new battery Charged up and all wires have be checked as stated above. Start Engine and let idle, Take a Volt meter on DC setting and place one lead on positive side of battery and Black on Negative see what the meter reads. Now with it still hooked up (Meter) Rev engine up and see the reading now! If the meter shows a discharge when you rev it up the Stator is Bad. If it shows over 16 volts the regulator rectifier is bad and needs replacing. It would be overcharging and burning or shorting out your Batteries! If it reads 14.5 to 15.5 volts it is Normal and most likely your New battery is Bad Take it back! Hope this is some help to you! Rick
PS! Road Rash Hurts, SO keep your Chin Up!!

Jul 08, 2009 | 2006 Suzuki GSX-R 750

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