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Forum Archive: Thanks for 15+ years of posts! Boards are now read-only. For mechanical troubleshooting, download official factory manuals here. If yours is missing, let us know. Our team is focusing entirely on improving the parts store to keep riders on the road!
Any future maintenance tips, technical news, or occasional short tutorials will be posted directly on our official blog here.
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    • #12009
      Matty
      Participant

      Hi I’m new to the page, my mate moved from York (where I live) to the cost and couldn’t take his GT125R. He’s asked me to work on it and sell it. The bike has been stood since 2018 and it won’t start. I have checked the carbs and cleaned the jets out they are fine, the bike started reved up to 6k then died I checked the spark plugs by taking them out reconnecting to the coil pack and putting them against the frame to earth it to see if they start. One sparked and the other didn’t, I changed both spark plugs and now it dosnt want to start. I’m not working on it until spring when it gets warmer, and information would be much appreciated

    • #12012
      ♠️ M77
      Keymaster

      Hey,
      Did you replace the coils and the plug caps ?

      First thing is to make sure there is bright blue sparks from each plug  , then we can see about air and fuel next

      • #12013
        Matty
        Participant

        Hi no I was looking for a set of new ones but until I found this site I didn’t know where to look as where I get parts for my cbr125R and ybr on fowlers parts they don’t do hyosung parts

         

    • #12014
      ♠️ M77
      Keymaster

      If you you want , send us an email if you have any sales questions regarding the store , using the “Contact us” link at the bottom of this site.

      In regards to technical help, you landed on the right forum.

      If the bike has been sitting since your last attempts to start it, i would get a siphon and drain the fuel tank  (trust me on that)
      Drain the carbs too
      Also , the Hyosung carbies want E5 fuel only

      If it is alien to you to work on the carbs, you can always send it to us and we will clean it & sort it out properly , mixtures etc  –  but again email us in any regards to sales enquiries if you want my services

      If you hire a local mechanic , make sure he knows how to work on mikuni carbs on big cc bikes first as these jap carbs don’t play ball if we cut any corners. 😬

      While you are here , i hope you have lurked around enough of this forum to see old topics with answers to common questions asked by other members before you

      • #12015
        Matty
        Participant

        Marcel as in Marcel from the hyosung page on Facebook

    • #12016
      ♠️ M77
      Keymaster

      Marcel as in Marcel from the hyosung page on Facebook

      Yup, admin of other fb groups besides Hyosung Owners UK (with the hyoriders flag on it) and on ebay too , welcome to the dark side!

      • #12017
        Matty
        Participant

        Aww nice and thanks.

      • #12018
        Matty
        Participant

        Have you got a link for your ebay page please bud

    • #12019
      ♠️ M77
      Keymaster

      Have you got a link for your ebay page please bud

      Will respond to your email shortly ,  and [[tap here]] for the ebay shop

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