Question about 2008 Honda CB 1000R

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My battery has gone flat. Does my bike have a regulator?

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Yes charge battery start up put voltmeter on battery see how many volts are making Should be 15.50 if it charging. Could be statter or voltage reglater MOPAR KENNY

Posted on May 22, 2011


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1 Answer

My Harley Davidson goes flat after 2 days, why?

What goes flat, tires or battery??

If tire goes flat you could have a nail etc in the tire or a bad/porous tire or a leaking/faulty filler (Schraeder) valve

If it the battery goes flat does it do so if you ride it or just if you let it sit or both??

If the battery goes flat even if you ride it you could (doubtful on a Sportster) have to many accessories on board drawing more current than the system is designed to support, Or you could have a bad battery that will not accept or retain a full charge, OR you could have a bad or broken regulator ground, OR you could have a defective, weak alternator, OR you could have a grounded, shorted or otherwise defective stator, OR you could have bad, corroded or loose battery post connection(s) OR a poor battery to frame ground (negative) connection.

If the battery is good and fully charges and holds a charge if not connected to the motorcycle you could have a dirty battery or some other high resistance path to ground from the positive side, or you could have an accessory improperly installed on the bike that still daws power even if the ignition is shut off. MORE LIKELY is that you have a defective voltage regulator. If you disconnect one of the battery posts or pull the main fuse and the drain stops you will know it is not your battery that is no good. If you disconnect any accessories or pull the accessory's fuse and that stops the drain you will know that it is the accessory that is draining the battery and if you disconnect the regulator and that stops the drain you will know that the regulator is defective. If you pull the main fuse and the drain stops if might be the regulator but that does not isolate the regulator independently of all other circuitry so it might be the regulator or it still might be something else in the bike's electrical circuitry.

Aug 23, 2014 | 2006 Harley Davidson XL 883C Sportster...

1 Answer

My CDI burnt out, the Rev counter went mad, CDI smoked, nd bike stopped with blown front & rear bulbs and a dead flat battery. I replaced all the above. a month later it's happened again, smoking CDI,...

Your regulator may have went bad. The regulator converts the ac charge produced from the alternator into the DC volts required to charge the battery. When they fail they can put out 5 times what the battery needs. Depending on your bike the regulator may be separate from the alternator. You should pick up a cheap volt meter. Once you get the bike running, use the volt meter to see what the bike is charging at. If you find the charge is above 14.8 V or that the voltage fluctuates to the extreme, ex. 14.2v, 8.2v, 12.7v all within a few seconds. then the regulator is probable. Another problem I have found is that the ground wire for wiring harness does not get hooked back up. This is a smaller ground wire that may plug into the main ground cable or sometimes is a separate lead connected to the battery. This will fry an entire system.

Oct 30, 2013 | Honda Motorcycles

1 Answer

The battery on my van van is brand new in November but last week my bike cut out while moving because the battery was completely dead. I charged it up but it's gone flat again.what is happening an

sounds like you have a charging system problem. If you jumped the bike off of another vehicle you likely fried the regulator and/or the stator or they could have a bag connection (never jump start a bike/scooter etc). the voltage regulator converts the AC power produced by the stator and converts it into DC power so the battery can charge. If it's not converting the power the AC power will continually go into and out of the battery (since AC power moves back and forth instead of in a straight line like DC power.) Look up the testing procedures for the voltage regulator or take it to shop. you could also find one for cheap on ebay if you don't want to take it to a technician.

Feb 06, 2013 | 2006 Suzuki RV 125 VanVan

1 Answer

Sportsman 600 not charging and running rough

problem with the older 600s was the regulator would go then the stator would follow. make sure to check you resistance values on your stator as well. i ran into this alot.

Jun 09, 2012 | Polaris ATV

3 Answers

Battery doesn"t charge

You have a couple of options here. Either your battery is dead and needs replacing as battery's these days aren't what they used to be. you will know this if you try to charge it off the bike and it won't take charge in this case change it. Or you have a problem with the regulator rectifier and again could need it replacing. Charge the battery up off the bike (if you can) and get a multi meter on it and make sure its reading at least 12v then put it on the bike and start it up. Put the multi meter on the battery when the bike is running and if the voltage goes down then its not charging from the engine. In this case you will need to buy a regulator rectifier.

I hope this helps


Sep 02, 2011 | 2006 Honda ANF125 Innova

1 Answer

Battery over heated. bike shut down.

Voltage regulator failure, possibly overcharged the battery. Did any lights burn out? Is the battery water low or gone in any cells? Voltage regulator failure usually means no charging but it can overcharge to. Take battery to the shop for load test etc.

Dec 27, 2010 | Suzuki GSX-R 600 Motorcycles

1 Answer

When i charge my battery put it back into bike take it for a ride come back the battery is flat


Aug 04, 2010 | 2005 Honda CB 1300

2 Answers

The battery on my DRZ400s runs down even when riding

maybe your stator is not charging the battery,also check you voltage regulator..

Oct 13, 2009 | 2003 Suzuki DR-Z 400 S

1 Answer

Battery not charging

it will either be a stator problem or your regulator rectifier has gone down , id say most likely to be the regulator rectifier ., not really a good way to test these with a meter its just a case of check what readings you are getting from the stator if they are ok fit a new regulator ,your regulator is a square peice of metal with lots of cooling fins on it , here is a idea of what it will look like as this one is on ebay im unsure if it is the right one for your exact bike as i dont know year and model code etc , but should give you a idea what your looking for .

hope this helps ,
kind regards

Mar 18, 2009 | 1990 kawasaki ZXR 750

1 Answer

Dead battery after a long ride

Yes, it could be the regulator. Running a battery flat MAY kill it, so try to recharge it and then load test it. Put a fully charged battery in the bike. Hook up a voltmeter and start the bike. Rev engine to about 3-4000 rpm. If your regulator is working you should be getting about 14v. If the reading does not change from what it was before you started the bike, your charging system is not working. Do test the parts before you simply replace them.

Mar 16, 2009 | 1990 kawasaki ZXR 750

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