2 days before i broke my foot i beat a 1978puch mk2 2 speed za50 color lime green 800 miles on it i beat it on a tiny slope hill and he started about 5 moped lengths away i have a 1978 sears free spirit(PUCH in know)but this thing had low miles when i got it i ran hi rpm 2 stroke oil which actually made a hell of a difference and my gear oil was a different choice but its a e50 1 speed holy shit does it go fast when u get long enough distance how do i mess with the gearing