I have a 1981 PA50II frame with a 1978 PA50II Engine on it. I converted the 78 engine to CDI. Anyhow, my speedo cable is broke and I have no clue how fast I am going. Either way...I know it's faster then 30. I mean, how!? I am all stock. Especially at night, this thing will fly. Gets kinda scary. All original engine, piston, rings and so on. I did clean the exhaust, cleaned the carb very very very well.
So am I just lucky? hahah I dunno.