Forums 🚥 PIT STOP 🔧 Hyosung Technical Help Gt125r 2012 die when clutch is let out

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    • #5552
      Matt
      Member
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      Feb 7, 2020
      @thegamep1
      Nottingham
      Gt125r

      Hi all. I’m in need of more help again.. when riding home the other night my gt125r decided to fall out with me again, riding was fine but when I stopped at lights all was fine. I then went to move and when I let the clutch out the bike needed nearly full throttle to move. I managed to get it home but now when I put it into 1st and release the clutch it just bogs and then dies. I know it’s not the the kickstand switch as this has been bypassed and adjusting the clutch cable is not doing anything.

      Thank you in advance

      Matt

       

       

    • #5556
      Simon
      Member
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      Feb 7, 2020
      @syco
      Kent
      Gt250 f1

      Check the clutch switch 2 prong connector on the lever housing pretty sure it will have one fitted you can bypass it.

    • #5562
      Matt
      Member
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      @thegamep1
      Nottingham
      Gt125r

      Hi Simon, thank you for your reply.

      Ive bypassed the clutch switch however it still continues to die out

    • #5563
      Simon
      Member
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      @syco
      Kent
      Gt250 f1

      If you put it in gear pull in the clutch can you move it without the engine running

    • #5567
      Matt
      Member
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      @thegamep1
      Nottingham
      Gt125r

      Yes bud. It moves fine when engine isn’t on and it’s in gear with clutch pulled in. When the engines on and the clutch is pulled in I have to rev it up to roughly 5k revs before I let the clutch out. The revs then dip down to 1k and the bike struggles to move. Anything below 5k and it dies

    • #5569
      ♠️ MARCEL
      Administrator
      • Topics: 38
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      Feb 7, 2020
      @mf448kxn6
      North UK
      GTR

      Yes bud. It moves fine when engine isn’t on and it’s in gear with clutch pulled in. When the engines on and the clutch is pulled in I have to rev it up to roughly 5k revs before I let the clutch out. The revs then dip down to 1k and the bike struggles to move. Anything below 5k and it dies

      Thats the carb and tap + pump

      Or sparking electrics.

      Worst case clearances or compression.

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

    • #5571
      Matt
      Member
      • Topics: 2
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      @thegamep1
      Nottingham
      Gt125r

      Had the carb off and cleaned today. Still struggled to start. But when took out front spark plug to check the spark against the engine the bike came to life but when the plug went back it wouldn’t start again

    • #5572
      ♠️ MARCEL
      Administrator
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      @mf448kxn6
      North UK
      GTR

      How was the carb cleaned?
      Small cleans won’t do much, there is so many holes inside. It requires an air compressor as per OEM,  liquid cleaner is like stage.   Even the permanent Jet called Starting Assist that’s inside.  If in doubt, try get the carb to an ultrasonic cleaner guy.

      A new shape rear end bike (black engine) does take a LOT of cranks to start if anything is amiss (as much as an intake leak  or loose connections near the manifolds and the airbox)

      Get halfords easy start and spray the air filter many times.
      You have 1 good chance here.
      Twist the throttle up and down many many many many many many (many!) times while the bike is cranking over.
      Put choke on.
      Let it rev at 5k for 5mins before turning off choke.
      if it dies, it probably cause the idle screw was not screwed in , adjust the idle screw and retry.
      Also make sure battery is charged. It really matters.

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

    • #5573
      Matt
      Member
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      @thegamep1
      Nottingham
      Gt125r

      Hi Marcel. The carb was cleaned with cleaner and compressed air. She boots up and idles nicely now in neutral. However when I put her in 1st and go to let the clutch out she just dies off. The clutch switch and the sidestanf switch are both bypassed

    • #5575
      ♠️ MARCEL
      Administrator
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      Feb 7, 2020
      @mf448kxn6
      North UK
      GTR

      I would double check the clutch bypass and the standbypass again.

      The CDI isn’t sure thats why you cut when engaging 1st gear.    I rarely encourage bypassing clutch switch. Peharps consider connecting it back ?

      Though the sidestand switch can be bypassed yes as thats the most annoying thing on thebike tbh.

      Also check neutral switch.

      If i doubt i can upload a diagram which shows which points of the bike cut sparks off.   (ignition interlock system)

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

    • #5576
      Matt
      Member
      • Topics: 2
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      Feb 7, 2020
      @thegamep1
      Nottingham
      Gt125r

      The diagram would be a huge help please Marcel. I connected the clutch switch back earlier to test and it still cut out

    • #5580
      ♠️ MARCEL
      Administrator
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      @mf448kxn6
      North UK
      GTR

      Diagram #1

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

    • #5582
      ♠️ MARCEL
      Administrator
      • Topics: 38
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      @mf448kxn6
      North UK
      GTR

      Diagram #2

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

    • #5583
      ♠️ MARCEL
      Administrator
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      @mf448kxn6
      North UK
      GTR

      Only after you followed the diagrams.

      Then be *wise & careful* doing this. Have someone with you.

      Bike on paddock stand.  Start it.  let it idle for 2mins.  Drop to 1st gear. See if the rear wheel spins.

      Did the wheel spin? If yes step 2 below

      Rev up while in gear. If it cuts. Its your carb or whole fuel system again.

      This is assuming clutch is OK (the whole basket inside the motor) plus cable adjusted properly.

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

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