I just saw this bike for first time today.Looks great and price is right.I have been looking to get back up and ride after 20 year relapse of not owning some kind of bike. At 58 years old I want fairly light,nimble,street bike. Don´t need a pocket rocket but the rated top speed 70 or 75 moph won´t feel safe enough if cars are going to be whizzing by. What could be done to increase power and top speed numbers? Thanks for any help.