Where do you download a free wiring diagram for a 1995 Honda CR125 Dirt bike?

There are a lot of websites that offer "free" downloads of various diagrams and manuals for all kinds of motorcycles. However, when you enter them, they will ask for your credit card number. So this is something you can't be sure is entirely free. I would advise you to join any large dirt biker's forum (of which there are many of them out there) and get in touch with the members who may then give you the information you want. They can do this either directly or point you to a private website. One other possibility is to go to a large Honda motorbike dealership and ask them for a copy of the diagram you want from a service manual. Mostly, you will find helpful people in these dealerships, and they might help you.