Interesting.
From what I've read in the service manual the swing arm can be removed from the AK without removing the engine. Don't know if that would make it easier to remove the engine separately though. Maybe easier to handle the engine alone without the swing arm attached. But this video is really only about showing what it looks like out of the bike with the swing arm connected. To bad they didn't show HOW to remove the engine. But the service manual does.
