Moped Army

For the exhaust you want to figure out how to make the rear opening bigger, and take out some of the restriction in the silencer if possible. For the intake you will need a new filter and probably some hose clamps to attach the filter to your carbuerator. The only mixture i would really mess with for you would be your air screw, its a screw(Not the piston idle screw) that goes into your carbuerater. Well a neadle valve actually. It adjusts your air break up of the gas entering the engine, which makes the mixture leaner or ritcher. You might need to jet if you mess with the pipe, to keep you running max, but what kind of carbuerator do you have?