Okey dokey. So I just bought the 1980 Z250b (many thanks to lordtb and minimatron). Loving it so far, but one thing is keeping me from enjoying my riding like I used to before the accident. The front brake is a drum. I figure the front wheel to be 16inch as the tyre as 16's stamped all over it. It already has the caliper mounting holes on the fork for twin discs. The question is: can any 16" rim with twin discs be used assumin I can get someone to do spacers, etc? Also, is there a standard size of the caliper, or will I need specific Z250b calipers? Can any disc fit any caliper? Could I find maybe a Z of a larger size from around the same era, maybe the Z600? (i'm hoping to maybe pinch the carbies off one of those in the near future) Any help is GREATLY appreciated. THanks guys!