Reply To: [How to Tutorial] How to Swap Upgrade Carb Main Jets Hyosung GT GT125R GV250 GV125 GT250R Dec 11, 2018 at 6:13 PM #2053 shane👤 Member Topics: 0Replies: 7 Thanks for the reply. I will look at the black sliders again tomorrow night. The bike was played with before I had it so it could be anyone of the faults you have mentioned. Cheers shane