I have this exact same scooter, drive it to work when I have to go into the office. Hit 6580 miles the other day. I can get it up to 63 on a flat straight road.
I have one of these old beasts. The piston was so scratched up and smashed it was burning 1oz a mile of oil. Smoking soooo bad and had a speaker wire wrapped around between the plug and cdi. And I could still hit 55mph with 2 people on it.. !