Reply To: Hyosung GD250R FI LIGHT
Pops on exhaust can be a sign of something going on with the injection system if it sounds like misfire.
The true way of checking is by a mech usually get readings on meters on certain devices as how the service manuals instruct them based on what issues the bike makes.
I would consider again your exhaust system. At least go back to the stock filter and exhaust temporarily as it will be easiet to diagnose the bike without mods just yet.