What are the requirements to street legalize my dirt bike? it is a 2003 CR125?

The only thing you need to do to get it street legal is to put Speedometer on it, and put some Turn Signals on it, then you go to the DMV and get it registered. Then your all good bro.

Joe s is correct, you cannot street legalize a 2 stroke motorcycle.....

First off you may get more answers if you post this in the motorcycle section in cars and transport as you are not racing the bike and it isn't a racing question. Also while you may be allowed in the country you are in, to make this bike street legal (you couldn't in Australia), have you really considered how it is going to handle on the road as the bike is set up to ride mx or dirt and not roads. It would most likely handle like a bag of p*o on the road. Maybe you should look at some of the bikes that are already set up for road as well as dirt. Be careful on the roads whichever you do.