Well i think i found the problem. It seems the diaphragm slide in the carb is getting stuck in the up position after riding at full throttle, and when i come to a stop sign, the diaphragm slide is still up and the scooter bogs/stalls when i twist the throttle again. I put a little oil on the sliding part of the diaphragm, and it helped for a little while, until the fuel washes the oil off, then the diaphragm slide sticks again, and the bogging/stalling returns. Im not sure what to do to fix this problem. Will a carb from a honda ruckus work on the agility?