I have a 1980 P200 and a 1974 Super 150. I also have a 2013 like 200 that I have not put 1000 miles on yet as I have owned it for about 6 weeks. Nice scooter - great brakes but terrible stiff shocks and I am still trying to get used to the seat.
Check for correct PSI in the tires, and set the shocks to their softest - see if that helps.
The Seat......is a ...
Well, just watch your knees don't get hung up with the grips on a slow turning.
After I rebuilt my seat I was able to scoot back and get my knees away from the handlebar.
Hopefully you're running your best oil in there? (one change at 75 miles, one at 600 - so scoot would now have 3rd bottle of oil in there)
Ride safe!
Stig