Derbi gpr 125 4t fake akrapovic exaust sound and back fires

[@underseer]

Hi! I also have a Derbi GPR 125 with a belly mounted Akrapovič, but I can't get it to backfire like that. What are you doing to get it to spit flames? Just abusing the throttle? What's your carb setup? Are you running rich?

[@mrxd5071]

playing wth the switch killer