@Verbieten FWIW here is the punch list I use when I R&R the alternator on my VS 1915cc. R&R time for first time will be maybe 2 hrs to remove but it's an easy process.
Click on pic to enlarge.
* Disconnect battery and remove wiring from alternator "Fig E"
* Loosen & remove 19mm nut on pulley. Remove front half of pulley. Remove fan belt. Remove back half of pulley (and a number of spacers/large washers) making sure to remove half-moon shaped woodruff key from alternator shaft "Fig D"
* Loosen and remove alternator strap "Fig C"
* Loosen throttle cable barrel clamp and pull throttle cable from behind fan shroud "Fig B" (this will facilitate lifting fan shroud).
* Loosen & remove bolt/screw holding throttle-cable body to fan shroud and lower attachment to motor case. "Fig B" (if attached with a bolt, use a 10mm wrench, bottom attachment point may require 13mm wrench)
* Loosen and remove remaining 3 bolts/screws of alternator/fan backing plate "Fig F" (if these also are bolts, use 10mm wrench)
* Remove (pop off) throttle linkage on 'Right' carbureter and let it lay on engine tin "Fig H"
* Loosen hose clamps on both sides of fan shroud and pull ducting away from fan shroud "Fig A"
* Remove bolts/screws on bottom of both sides of fan shroud (these attach fan shroud to upper engine tins) "Fig G" If these are bolts, use 10mm wrench or socket)
* With all these attachments removed, you should be able to lift fan shroud just enough (3 to 4 inches) to tilt the upper portion of alternator/fan assembly towards you and lift out of fan shroud opening. Might take a little wiggling of alternator/fan assembly to work out of the shroud opening.
* Take alternator/fan assembly to automotive shop to have them use impact tool/socket to remove bolt holding fan to alternator. Once fan is removed, remove screws/bolts attaching backing plate to alternator.
* With replacement alternator, simply reverse process, beginning with re-installing backing plate onto alternator, having automotive shop use impact tool/socket to attach fan to alternator with bolt.
* Reverse process to install your new alternator/fan assembly.
Hope this gives you an idea of what's involved. It's not hard to do. Best of luck!