Forums 🚥 PiT STOP 🔧 Hyosung Technical Help Gt125 running problems Reply To: Gt125 running problems
Hey,
It sounds like first off all the carb is heavily clogged up , you would be advised to get access to Air Compressor (as per OEM) and some liquid carb cleaner (don’t skip air compressor trust me)
– Clean the Main Jets, Pilots, Starting Enrichment Tube (the jet that doesnt come out in the carb)
– Clean the slides , check the rubber isn’t torn (put it up in the sky and see if light shines thru)(Can’t stress this object)
– Clean every hole thats inside the carb sekelon itself, those are air and fuel passages. Very tiny holes.
Once you have finished cleaner, check the 2 tutorials below to confirm your “Slide Needle” is in the factory or rich position (NOT lean!) and also that your main jets are in correct size (stock or not) and PILOTS are marked “15” each. (Critical)
[Tutorial] How to swap Carb Main Jets – Hyosung GV & GT 125/250
[Tutorial] How to adjust Carb Slide Needle (Tuning) – Hyosung GV & GT 125/250
Report back to the forum with your results after a quick test ride. Don’t forget to clean the plugs.
If we can address the monstrosity of a carb, then it will be easier to diagnose everything else in the bike if problems persist.
Last shout, when cleaning carb, be very religious about it! Best of luck!
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