03 v star 1100 classic charging issue.
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  1. #1
    Where Am I ?
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    yamaha 1100 v-star classic
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    03 v star 1100 classic charging issue.

    New battery kept running down, put a volt meter on battery posts. At rest battery reads 12 volts, I started the bike up and no change in volt output. I'm not seeing fluctuation up or down in output at idle or at 2000rpm. looking in the maintenance manual, it says " I should see 14.5 volts at 5000rpm " there is no way I'm running this motor to 5000rpm! Sitting on the bike "right side" the R/R is supposed to under the battery box, and the stator, looking at the leads seems to be under side cover. I think I'm going to have to drain the oil and pull the exhaust off. Is there a method of checking rectifier/regulator and stator without taking the bike apart?

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  3. #2
    Ditch Magnet
    My Bike(s)
    2002 SV-650N, 2007Yamaha 1100 custom
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    NW Pa.
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    https://sites.google.com/site/vstar1...harging-system with an ohm meter check the stator leads . remove the left side cover. and the plug with three white wires.the rectifier is under the right cover and you will have to remove the pipes. its all in the link and read the first section for new owners. there is a proper way of starting the bike so you don't screw up the starter clutch.

  4. #3
    Super Moderator

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    You don't need to rev the bike that high to get a good test.
    It should be above 12.8 even at idle......if it is working at all.

    By all means, test the stator.
    Sometimes the initial problem is failed connectors where the stator wires come out.
    Don't believe everything that you think.

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  6. #4
    Where Am I ?
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    Thank you both for your help. @nickbehavin, thanks for the link info read. May take a while, I'll give shout back and report findings that may help someone else.

  7. #5
    Ditch Magnet
    My Bike(s)
    2002 SV-650N, 2007Yamaha 1100 custom
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    i put a new regulator in last year i had a bad diode after a long ride it would';t charge. i have a battery monitor on my handlebar and it would go from green to red.the new regulator will only charge to 13.9 volts at 2500 rpms won't break 14 but it fixed the problem.some guys will find the connector coming from the stator melted and they solder the connection. if you replace the regulator it's recommended to get one from a 2005 roadstar which is plug and play and heavier duty.

  8. #6
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    Isn't there a systems failure light that would show up on the dashboard? Inside the face of the speedometer, there is a light for "low oil" , "high beam" and a "check engine" light. I've never had the engine light come while riding it. Wouldn't regulator or stator failure count as a engine system failed? I'm doing all of this because of a new battery running down acting like it's not being recharged. I get the feeling I've been riding around thinking everything is good when I've been riding around with the bike operating on whatever charge was in the battery.

  9. #7
    Ditch Magnet
    My Bike(s)
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    https://sites.google.com/site/vstar1...specifications ...............scroll down about 3/4s to the bottom. the is a troubleshooters code but i dont think there is anything to do with the charging system. i got a battery monitor from custom dynamics it alerted me to a failing reg. saved my butt. i mounted it in the speedo bezel 1/4" hole and jb weld to hold it secure.

  10. #8
    Super Moderator

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    Quote Originally Posted by 031100 View Post
    Wouldn't regulator or stator failure count as a engine system failed?
    NO.

    After decades of equipping most all vehicles with an analog voltmeter or ammeter, the industry finally woke up and realized that 99.9 % of the owners wouldn't be able to recognize a failure anyway......and stopped wasting the money. Most motorcycles never had any warning......and still don't.

    A digital voltmeter is an essential tool and can be had cheap these days.

    I thought we had already agreed that your charging system was bad somehow......and that further testing is needed.
    Don't believe everything that you think.

  11. #9
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    Still working on that. Checking stator and regulator, I think replacing them both would be a good idea. It's getting to them that's taking time to geterdone. In east texas at 100 to 111degs and 98% humidity I'm in no hurry.

  12. #10
    Super Moderator

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    Quote Originally Posted by 031100 View Post
    , I think replacing them both would be a good idea.
    Not really.

    In addition to wasting a fair amount of money and time, you might actually make matters worse.
    Taking wild guesses and shot-gunning parts at a problem seldom works out like you hope it will.

    You can test the stator and the associated connectors.
    You can remove and clean ALL of the main cable connections.
    You can check and re-seat all of the connections at the R/R, paying special attention to the grounds.

    It is hard to do a good test on the R/R, however, and if everything else comes up good, then that might need to be replaced blindly.
    Don't believe everything that you think.

  13. #11
    Ditch Magnet
    My Bike(s)
    2002 SV-650N, 2007Yamaha 1100 custom
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    you can get a good voltmeter at lowes for $30.00. stators are easy to check just three wires and you should get roughly the same reading from all three. i've been hanging around yamaha forums for eight years and in that time there has been only one reported bad stator. lots of bad regulators

  14. #12
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    Quote Originally Posted by 031100 View Post
    put a volt meter on battery posts. At rest battery reads 12 volts, I started the bike up and no change in volt output.
    Quote Originally Posted by nickbehavin View Post
    you can get a good voltmeter at lowes for $30.00.
    It appears that he already HAS a voltmeter.

    And even the little red ones from Harbor Freight are surprisingly capable. ($10)
    Don't believe everything that you think.

  15. #13
    Ditch Magnet
    My Bike(s)
    2002 SV-650N, 2007Yamaha 1100 custom
    Location
    NW Pa.
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    the $10.00 volt meter i got from harbor freight broke the first time i used it i thought i would advise him to get a good one.he did mention taking a voltage reading i was just covering all bases. my 2 cents for the pot.

  16. #14
    Super Moderator

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    Quote Originally Posted by nickbehavin View Post
    the $10.00 volt meter i got from harbor freight broke the first time i used it i thought i would advise him to get a good one.he did mention taking a voltage reading i was just covering all bases. my 2 cents for the pot.
    I have about 6 of them and they all are still going.
    The only failure I've had was one that got wet and sat that way for a LONG time.

    P.S. HF usually will replace anything of theirs that fails "out of the box" with no questions asked.
    Don't believe everything that you think.

  17. #15
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    yamaha 1100 v-star classic
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    I thank all of you for jumping in! Following the link from Nickbehavin, I used the ohm test on the stator side of the connection and got a 49.0 between wires. Link says I should see 36. to 44. reading. On another post, it said I should check each wire to a ground and shouldn't see a numerical value with any of them. I did, I got 1.1 to .05 doing this. I think the stator is toast. Test done with motor off, key off.


 
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