Need to identify the Rectifier and Regulator

[Boilermaker]

Starting the re-wire on my 1979 xs650. Under the battery tray were a few components which I think I have identified but need some verification. The attached photo shows a black box with rounded edges and 4 wires (black, yellow, green, red). I believe that is the regulator however the 4 wires do not seem to match any diagram I can find of a regulator with 4 wires. The other two small black squares, each with four male tabs seem to be the rectifier(s). Before un-wiring 3 of the white wires from the alternator connected to them. Questions is if I am correct, can I replace these two items with a combination rectifier/regulator and if so which one is recommended.

Additionally i have loosing total power while riding. A fuse coming off the positive lead from the battery is blowing. Would either of these components, if bad contribute to this problem? Help a brother out, need to get back on the road.

 

[Grinder]

You are correct about the components. You could replace both for much cheaper that buying the combo unit. I have these on my bike and it charges great. Here's some info on both.

http://xs650temp.proboards.com/index.cgi?board=Charging&action=display&thread=3246

http://xs650temp.proboards.com/index.cgi?board=Charging&action=display&thread=3473

You need to check your charging system out, plenty of info on the site about doing that.