sorry for posting again i re read this
Oh and finally, select the right carby size, for the motor you have. Dont throw a 28mm flatslide on a 110 motor.
use this as guide...
110-125 motor, no mods : use a 22mm or 24mm flatslide.
125-140 motor, no mods: use a 24mm
140cc with mild mods/150 or 160...