Hi i put a post up ages ago about my aerox that had problems the problem is that it keeps fauling spark plugs like every 2 weeks ive changed the jet size from 90 to a 80 and still not having any luck only other thing i can think of is the air screw on the carb and because its a 70cc its got a 21mm carb on it so if i change the air screw to make more air go in do you think this will stop the spark plug from fauling