i have a 2015 roughhouse 50. I’ve had a mechanic install a Stage6 MK2 70cc Cyl kit, 6g rollers, and a mallosi yellow contra spring. I also have a Stage6 Pro Replica Exhaust and racing paper air filter. It performs less quality than stock (even with jetting). I’m sure i’m under carb’d. I’ve purchased a Stage6 R/T Type PWK21 Carb but the stock intake is too small. Shall i get a performance intake (NCY) or back the carb down to a 17.5mm Dellarto? Thanks much.