Originally Posted by 2door
Prodigit, Gear high. I know the terrain where you live well and hills are non existant. A well tuned 2stroke with a 36 or even a 32 tooth rear sprocket should be able to provide your 35/40 desires. You also have the added advantage of sea level tuning. That can be significant where horsepower is concerned. You'll need to pedal assist from dead stops but from there the engine should provide enough power for you.
I Agree with you tom, i got my bike going last night with a 32 tooth rear sprocket i hit about 36 not broken in yet, cant wait to get it broken in and see how she really goes. And as people have said before 40 MPH on a Walmart pedal bike is scary, be careful and check and grease your bearings