Hi,
The clutch is dragging a bit. This makes it hard to shift to neutral when the bike is running. Adjust the clutch cable a bit tighter at the lever perch and see if it helps. Make sure there is enough oil in the crankcase as low oil can make the clutch drag as well. As far as speed goes they are not the fastest things on the planet.
Check to see if the previous owner changed out the rear sprocket to a larger size. Many times people do this to achieve lower gearing for trail riding. I believe 45 teeth was stock on the rear.