Here's the front's on my bike (Kellerman Micro 1000's). Rear setup is the same as Old yella's.
Only dodgy bit on changing them is the threading of the wires back through the front airtubes. The indicators come off easily enough because you have bullet connectors just under the headlight unit (when your nose cone is off) that simply pull apart letting the cables pull through the airtubes. Easiest wasy to reinstall is to tape some wire or simillar to the loose ends so that you have something to pull back through when you attach the new indicators.
Doesn't really apply if you go down the Kellerman route, cos you have to separate the airtube halves to install the indicators in the first place, so cable routing is simple.
[Edited on 19-5-2003 by Guido]
[Edited on 19-5-2003 by Guido]