Question about 2002 Yamaha V Star 1100 Classic

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Charging system on 2002 yamaha v star.

Is there any to check the voltage regulator on this bike?

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I posted back in your initial post here. A few ideas to consider/try:

  • normally, there would be 3 wires coming from the stator going to the regulator;
  • AC voltage measured on any pairing of these wires would be higher than 12 depending on the RPM above 1200;
  • DC voltage output would tend to vary from 12 to 13.8/14.2 depending on the RPM;
  • the best check would be to install temporarily anammeter inline with the wire coming from the regulator going to the +terminal of the battery. With this, the presence/absence of thecharging current could be checked.
Cheers.

Posted on Feb 13, 2009

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How to test rectifier 2006 road star


Hi, Anonymous the systems check below is geared towards Harley Davidson so exact numbers might differ slightly with book specs on your bike but the basic principal is the same, in order to check out any main electrical system, you have to start with a fully charged battery 12.5 volts or better, and be able to pass a load test if necessary. "WARNING" never plug or unplug any electrical connector with the engine running !!!
1. Check battery terminals for damage or corrosion, check battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
2. Check the voltage drop at the battery when you hit the starter button, anything below 9 volts you might have a faulty battery.
3. Check voltage at the battery with the bike running at 3,600 RPM should be 14.3 to 14.7 volts. If you are not getting these numbers, you might have a faulty voltage regulator.
4. Make sure voltage regulator is "GROUNDED" and functioning properly, watch the video below on how to test a voltage regulator.
5. Unplug the connector to the alternator and hook your multimeter leads to the alternator (pin/socket selection does not matter) set the multimeter to AC volts, at an idle the multimeter should read 16 to 20 volts AC. at 2,000 RPM 32 to 40 AC volts, 3,000 RPM 48 to 60 AC volts. If you are not getting these numbers, you may have a faulty alternator rotor.
6. Set the multimeter to OHM'S, connect one lead to the alternator (any pin/socket) and the other to a ground, the multimeter should read infinity. Connect both leads to the alternator multimeter should read 0.1 to 0.2 OHM'S. If you are not getting these numbers, you have a bad stator.
7. Check all wiring in the charging circuit for worn or chaffed spots and all wiring connectors in the circuit for corroded, broken, or loose pins/sockets, which is the # 1 offender.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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there is a regulator rectifier assembly that rectifies the ac coming from the stator and then regulates the voltage to both charge the battery and run accessories and lights....if you can obtain a voltmeter, try starting the bike and measure the voltage on the battery..it should be about 14V DC with the bike running...if not then switch the meter to AC and check the leads coming from the stator(they are the leads that come out from under the clutch cover)...the measured voltage from the stator should be around 30v AC and will go higher when you rev the engine....if this voltage is not present then the stator is defective...if it is then the rectifier/regulator is probably bad...also, make sure that all the fuses are good

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On an 1100 V star why would the charging system work perfectly for about 10 min. then quit charging. I charged the battery, checked the voltage had 13.72 volts before start up. apon turning on the key...


first thin is to clean up all contacts neg and pos, coild be one is loosing contact due to heat, nest step is monitor cahrge rate at alternator when drop occurs , if so then it is probably internal

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Hi, Rogers2006 for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
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Oct 15, 2010 | 2002 Yamaha V Star 1100 Classic

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Good evening sir, I have yamaha R1 bike. in bike yesterday battery discharge than charge the battery. today bike start and running but after .5 miles bike is stop running, self is not running and battery...


1998 to 2002 have problem with plug to voltage regulator/rectifier which is under seat. connectors in plug overheat and bike stops charging the battery. you will see if connectors have been hot and will need to be replaced if they have.
once replaced check bike charging with multimeter at battery,should make 13.5 - to 14.5 volts just above idle. if not will need to test stator and regulator.

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1 Answer

My bike is a 2001 1100 v star that seems to be eating batteries all of a sudden. I was on a ride 2 moths ago and the bike started skipping under a load and when I stopped to check it out it shut off and...


My initial thought is you haved a faulty voltage regulator. You should be charging at about 15 volts, but when your battery gets charged, the voltage regulator should turn the charge system off.

Your battery is hot ... you are over charging.

Im sorry, I dont know where your regulator is located.

I hoped you find some value in this comment.

a

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1 Answer

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If you take a look at the parts microfiche (make sure this is your bike please), the voltage regulator and rectifier is a little under $70. Labor for installing it would probably be in the $200-300 dollar range at a dealer.

Have you checked the voltage while the bike is running? It could be that the lights are simply drawing more power than the charging system can put out. Put a voltmeter on the bike and start it. Rev engine to 2-4000 rpm (or just ride the bike if you can see the meter while riding). Check with extra lights off and extra lights on. If your voltage is 14+ while riding or reving the engine without the extra lights on I think your charging system is probably OK. If it is below 13 (again, without the extra lights on) I say the charging system is bad.

Apr 10, 2009 | 2002 Yamaha V Star 1100 Classic

2 Answers

What would cause the battery to heat up so hot that it would boil


Failed voltage regulator could do it too. If you can start the bike, put a voltmeter on the battery or charging system output. Should be around 14-15 at 3000 rpm. If it is much over that your voltage regulator is probably bad. Sometimes those regulators overcharge when they heat up too, if yours is in a location that does not get much airflow it may be possible to relocate it somewhere more "in the wind".

Apr 06, 2009 | 2002 Yamaha V Star 1100 Classic

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