Forums 🚥 PIT STOP 🔧 Hyosung Technical Help GT650R 2007 – Fault with Battery draining..

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    • #3656
      Nick Wilkins
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      @wilki1990
      Oxfordshire
      GT650R
      Points: 59

      Hi There,

      Sorry if this post is somewhere else on this forum and I have duplicated it, but I did look everywhere before I posted this and couldn’t find anything.

      I have a 2007 GT650R, and the problem I have is the battery simply drains. I have replaced the battery with a new one but after a couple of days it is dead. I also took the bike out on a decent ride and towards the end the bike started to die, then when it did (about a mile from my home) it would not start again.

      Any ideas would be greatly appreciated.

      Nick

    • #3657
      ♠️ MARCEL
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      @mf448kxn6
      North UK
      GTR
      Points: 3,909

      This is commonly , i mean commonly across the hyosung 125 to 650 twins is the regulator that fails a lot and tends to take the stator with it or the stator has waned down fast and has took the reg with it. bike running like its on limited juice off the battery then battery has issues.

      Start your bike , unhook the 3 yellow color plug coming from the stator , and rev to about 5k ish , it should say about  80v AC (AC) strong across all pins  (ie. 3 pin means join any of the 2 pins on your meter but do it 3 times so that all 3 pins gave the same readings)

      and/ or bike is totally off , the stator yellow plugs will be about 0.5 ohms ice cold (less than 1)

      the regulator should be saying 14v at 2k revs  ,   any 13.x v DC (DC) readings at battery will mean regulator needs attetion.

      There is different types of regulators used on the hyosungs , they are not properly made so even i wouldnt dare sell one for a 125cc bike , the 650 wont play games.   Common upgrades are the shingden ones with some fabrication ,  but a “plug n play” reg would me i need to know specs of your reg or its part number printed,  i can always build a mini harness to retrofit the regs that are sold on this site ,      I pray the stator is in good healthy , they don’t make em no more in KR ,  so aftermarket is usually the way but never ever ever chinese.

      // Meditation doesn't mean you have to sit still....

    • #3661
      Nick Wilkins
      Member
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      @wilki1990
      Oxfordshire
      GT650R
      Points: 59

      Brilliant, thank you for the quick response.

      I will have a look at the stator and regulator tomorrow and let you know.

       

    • #3664
      Nick Wilkins
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      @wilki1990
      Oxfordshire
      GT650R
      Points: 59

      Hi Marcel,

      I have done some digging and found out from bike shop I purchased it from, that the stator and regulator has already been replaced about a week before I brought the bike.

      Do you think I should still test the stator and reg? Or could it be anything else?

      Thank you for your help with this by the way.

    • #3667
      ♠️ MARCEL
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      @mf448kxn6
      North UK
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      Points: 3,909

      We don’t know what brand or part numbers the stator n reg came with as the 650 uses various with the GV sometimes or wrong one was fitted causing it not to recieve magentism from the flywheel to charge up the coils , we don’t know till they confirm specifics .  I would still test it and your mind will have the answer right there  if its producing or not.

      // Meditation doesn't mean you have to sit still....

    • #3673
      Nick Wilkins
      Member
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      @wilki1990
      Oxfordshire
      GT650R
      Points: 59

      Hi Marcel,

      I have found out the stator has come from Ebay.. and the reg has no brand name or part number. I have attached some photos for you to see yourself, not sure if they will be of any help. I am going to test them both tomorrow when i can get my multimeter…

      I am wondering if it would be worth replacing both the Regulator and Stator, what do you think? If you do, could you suggest the correct reg and stator?

      Thanks Nick

      Than

    • #3675
      ♠️ MARCEL
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      @mf448kxn6
      North UK
      GTR
      Points: 3,909

      I’ll be honest to say the pics look like you may have taiwanese copies of these things which are just as lethal,    so may not be a true mosfet type reg  or genuine hyosung stator (though they are woeful too)

      Shingden is the common reg upgrade which involves wire splicing etc, so it wont be too cheap either but its better than the basic shunt types Hyosung uses & some ebay copies.   The 2nd also (which one of my bike uses) is the Electrosport brand from US, good regs and stators they make.

      You can always message me to get the ones listed on this page which then includes the mini conversion harness, so you pretty much fit and fire away. I’ve done this for EFI bikes since their regs have different outlets  even their stators vary!

      Test your stator and hope it is producing, as this will be a longer road to replace you the correct one , as it depends on:  Year of bike, what the flywheel LOOKS LIKE inside, and which stator in the database i can look up to match it ,  though i’ve been doing aftermarket stators for the smaller bikes ,   the 650 folk usually upgrade to a kawasaki stator if its a carby bike as its easier to put simply , though maths & research work is involved going this route ,  it seems to have paid dividents for a few i know.

      // Meditation doesn't mean you have to sit still....

      • #3685
        Nick Wilkins
        Member
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        Joined:
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        @wilki1990
        Oxfordshire
        GT650R
        Points: 59

        Finally done a few tests on the stator and regulator and got the following results ; –

        Stator Test from cold – the readings were roughly 0.3ohms across all pins

        Stator Test with the bike running at 5k (ish) revs  – readings were roughly 55/56v across all pins.

        With the regulator i actually found a break in one of the lines whilst carrying out a diode test, and the reading i got from the battery whilst the bike was running at 2k revs was 12v.. so from the results i got, i believe the regulator is at fault and needs replacing..

        Could you suggest any decent regulators for me to replace the faulty one with?

    • #3690
      ♠️ MARCEL
      Administrator
      • Topics: 38
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      Joined:
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      @mf448kxn6
      North UK
      GTR
      Points: 3,909

      If you struggle on amazon or something I can always send one just email me and will supply correct ones.

      The ideal regs as before
      – shingden for hyo , involves splicing , popular in US.
      – another brand to check out is Electrosport n i own one on bike #2 for years. I do them sometimes for EFI machines as i have a GV250 Efi as test bed. 250 and 650 need same readings anyway and tend to share regs.

      The service manual prefers the bike does least 70v at 5k revs. Optimal is 85-99v.

      Reg will report 14-15v optimal with a healthu battery.

      Consider your stator is not saying 55v across all 3 pins? Thats asking for a change by sounds of it.

      // Meditation doesn't mean you have to sit still....

      • #3692
        Nick Wilkins
        Member
        • Topics: 2
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        Joined:
        Jan 3, 2020
        @wilki1990
        Oxfordshire
        GT650R
        Points: 59

        I have ordered a regulator from Electrosport, and retested the stator and It does say 55v across all 3 pins…

        I’m slightly worried though…

        Would you say the regulator from Electrosport and the stator I currently have, which “looks” taiwanese be compatible?.. the last thing I want to do is put a the new regulator on and the stator burns it out for example…

    • #3694
      ♠️ MARCEL
      Administrator
      • Topics: 38
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      Joined:
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      @mf448kxn6
      North UK
      GTR
      Points: 3,909

      I have ordered a regulator from Electrosport, and retested the stator and It does say 55v across all 3 pins…

      I’m slightly worried though…

      Would you say the regulator from Electrosport and the stator I currently have, which “looks” taiwanese be compatible?.. the last thing I want to do is put a the new regulator on and the stator burns it out for example…

      I replied to your email,    and yes I would say the stator may either take the reg with it (as it’s not able to regulate what your stator is doing so to speak) or a fishy regs takes out a healthy stator vise versa , so the 2 are kinda like a married pair for the charging system .  Stator is also part of ignition system anyway also  so it’s “blue and green” plug  flywheel trigger sensor will be around 100-110 ohms healthy for factory ones i believe, when bike is turned off.

      // Meditation doesn't mean you have to sit still....

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