Reply To: [How to Tutorial] How to Swap Upgrade Carb Main Jets Hyosung GT GT125R GV250 GV125 GT250R Nov 21, 2025 at 3:34 PM #21288 ♠️ M77👑 Admin🖊 Topic Author Topics: 40Replies: 3,035Country: UKBike Model: GT OEM size is 87.5 & 90 So your upgrade is 90 & 92.5 = no need to use “95” . Leave it there. 95 is for 250cc pistons, otherwise its too much fuel for aa 125cc, so your plugs will be too rich.
