Odd Charging Problem

Discussion in 'Maintenance' started by mattmk1, Mar 17, 2016.

  1. mattmk1

    mattmk1 Active Member

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    I know this has been done to death but im a little stuck,

    2006 Blade, rode to work no issues. Leaving work it cranked a little longer than normal but then fired and rode home. At home, turned it off, tried the starter again out of curiousity, no juice.

    Jump it, fires fine, when running it showing 11.5v across the battery and falling.

    Fully charged the battery, bike fires fine but still falling voltage at the terminals,

    So...

    Checked the diode readings of the reg/rec - all fine.
    Checked the Voltage out the phases of the stator - all fine. 15v on tickover rising to 45 ish at 4k rpm.

    Anything else to check??
     
  2. Mike07

    Mike07 Active Member

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    This is the best test I know, If not the charging system ... Battery.




    Charging System Test.




    1) Make sure the battery is fully charged, and tests OK. Take it to your local batteries place and have it discharge tested. After charging a bad cell in a battery can give you 12 volts, but fail under load. When in doubt, replace it.

    2) Start the bike. Take your electrical meter set to DC volts and measure across the terminals on the battery. With the bike running it should be somewhere between 12 and 13 volts at idle.

    3) Rev the engine, and measure the voltage at 4000 - 5000 RPM. It should climb to 13.9-15 V. If it goes over 15V, your regulator rectifier is cooking the battery. Replace it. If it doesn't climb, it's either your stator or your RR; you'll have to follow the Stator Testing Procedure below to determine which it is.

    Stator Testing Procedure
    This is probably the easiest, most reliable test:

    Always start charging system tests with a fully charged battery.

    1) The stator will have 3 wires coming out of it. Usually they're Yellow. Locate where they connect to the Regulator/Rectifier, and disconnect it.

    2) Start the bike.

    3) Take an electrical meter, set it to AC Volts. Measure voltage between any 2 of the wires. You should get 15+ volts across them at idle, and when you rev up the bike, it should quickly climb to anywhere from 40 to 80 volts.

    4) Check all possible combinations. If you don't get voltage, or get low/ none, the stator is bad.


    Every other test you can do (continuity to ground, resistance between the pins, etc.) won't answer the question: Am I getting output from the stator?

    If you're getting output from the stator, and the connectors look good, your Regulator/Rectifier is most likely unwell.
     
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  3. sulaco

    sulaco Active Member

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    Sorry to jump on your thread, but I'm having issues as well. Have done all the usual tests except the one above. I will do the above test tomorrow as I didn't have time today. I was told that the ground test(ohms setting on meter, negative to battery, positive to each pin) should give you no reading, I get a reading on every pin!!! Should I assume it's the stator? or still do the above test?
    I found a RR+stator set on E-Bay if I need to replace reasonable price, should I be worried about quality. Feedback score good. http://www.ebay.co.uk/itm/Alternato...538516?hash=item56816c3014:g:ADcAAOSwB4NWzD-m
    Many thanks
     
  4. Mike07

    Mike07 Active Member

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    Have you sorted it?
     
  5. sulaco

    sulaco Active Member

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    I have tested stator as you described and it's knackered giving 9v on two coils and 3.4v on the other even at 5000 rpm. So it's new stator time, still not sure if I should go for the E-bay deal, or just the stator. Cheers
     
  6. Mike07

    Mike07 Active Member

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    If I had the money I'd change them both. But that's me, I tend to have the thought process.... if I'm broken down on the A189 in the wind rain and dark, sick as a chip, I will be kicking myself about the extra few quid I didn't spend.
     
    #6 Mike07, Mar 20, 2016
    Last edited: Mar 20, 2016
  7. sulaco

    sulaco Active Member

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    Yeah I was told it's best to change both, because it's usually a dodgy reg/rec than blows the stator. Not sure if that is the case or just a ploy to get more money, but the e-bay deal is good value. Cheers for your input.
     
  8. mattmk1

    mattmk1 Active Member

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    Im still struggling with mine - fault appears to be intermittent!

    Rechecked it all tonight:

    Stator phases show 15V 17V 17V on idle - rises with revs.

    Reg shows 1 1 1 650 670 670 1 1 1 650 660 675

    With the bike idling im at 12.5 v across the battery, measuring what comes out the reg, its 12.5v although every now and then it drops randomly to 4, or 7 v and then back up.

    Im assuming the reg should give a stable 13/14V so im assuming this is the culprit.
     
  9. Dave V

    Dave V Elite Member

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    Worth checking all wiring and connections, especially the grounds/neg.

    Is any of the wiring getting warm?
     
  10. mattmk1

    mattmk1 Active Member

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    Yeah i went through the wiring, good earths where needed, continuity down the neg/positive leads to battery, checked the fuses etc.

    Nothing getting warm, just seems a little rattlier than normal so might pull the stator anyway.
     
  11. mattmk1

    mattmk1 Active Member

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    Pulled the stator out last night and one coil is burnt up, guessing i caught it early as it was still showing voltage, but was dumping some of it to earth.

    Typically its been nice weather this week :(
     
  12. Mike07

    Mike07 Active Member

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    Good news is not too expensive to fix, you're sorted for the summer.
    Mike.
     
  13. Mike07

    Mike07 Active Member

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    It's bu££erd......
     
  14. Sean M

    Sean M New Member

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    Hi how do I write a new post ? Thanks
     
  15. Mike07

    Mike07 Active Member

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    Open a topic... Bottom of the page...New thread
    Mike
     
  16. Sean M

    Sean M New Member

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    Thanks buddy.
     
  17. mattmk1

    mattmk1 Active Member

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    Think my woes continue...fitted the new stator tonight, from electrosports. Charged battery, she fires up and immediately sounds happier.

    At the battery:

    Cold start fast idle - 14.9V
    Warm idle - 13.9V
    Warm idle with main beam - 13.1V
    Warm blip the throttle to 4k rpm - 15 odd V. (headlights noticeably brighten).

    So i guess my reg/rec is screwed too.

    What i dont understand is why all my electrics pass the tests, but are fecked.
     
  18. sulaco

    sulaco Active Member

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    Bummer, what procedure did you use to check the reg/rec? did you check positive and negative sides, on all 3 pins, So you get 12 readings?I know it's not a blade reg/rec but same procedure. I watched this vid
     
  19. mattmk1

    mattmk1 Active Member

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    Yeah, so mine read cold last night:

    1 1 1
    573 575 570

    580 581 583
    1 1 1


    So resistances are in spec.

    Some articles on the web suggest 13 - 15.5 V charging is normal, but i always thought anything over 15 is too high.
     
  20. sulaco

    sulaco Active Member

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    Sorry just re-read your post, why do you think you still have a problem?
     
    #20 sulaco, Apr 5, 2016
    Last edited: Apr 5, 2016

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