std jet in an aerox varies ive seen some with 76 some with 86
well yes it will use more petrol,
but here's a bit of advice
dump the powerfilter and keep the normal airbox performance is just as good with the airbox and the noise is ridiculous with the powerfilter, also when it gets wet your scooter wont drive correctly when you have a powerfilter,it will start to get very choked up
and the jet is simple to change get to the carb behind the airbox strip off the belly pan is best then you remove the 2 flathead screws on the black bowl cover of the carb and there you see the jet in the middle it also comes out with a flat