I'm not home right now, I'm texting from my phone but when I get home ill try and post a link. I think if you do a search for cb125 there is a yahoo group. Joing it and they have the download. Or I think if you do a google search for cb100 manual it pops up. Try here
http://www.filestube.com/015c5fcf7fc9c28903e9,g/Honda-CB100-CB125-CL100-SL100-CD125-and-SL125-Workshop-Manual.html
http://www.filestube.com/015c5fcf7fc9c28903e9,g/Honda-CB100-CB125-CL100-SL100-CD125-and-SL125-Workshop-Manual.html