If you can inflate the tyres you can change a dizzy.
OK that might be a slight exagertion!!, but it is really easy, may as well do timing belt/tensioner at same time(if needed) ?
It is a bit fiddly to get to the 13mm bolt holding the clamp at the base of the dizzy, more by feel than sight, but take this off and it just pulls out, noting it's position first, then you do not even need to disturb belt if you don't want to, would probably be better to line up on tdc first though.
tabetha