I don't know how I missed this post yesterday. But, like Fourtrax said, the centrifugal clutch has left hand threads, so turn it clockwise to loosen. The centrifugal clutch is pressed on, but I've took a lot of them off over the years and I've never had to have a puller. Sometimes they are easy to get off and sometimes they are a little harder to get off. Sometimes, I have to use both hands and pull very hard to get them off. I usually give the side of the clutch a little rap with a hammer to jar it before trying to pull it off. Don't hit it hard enough to damage anything, just a quick rap to jar it. If for some reason you still can't get it off, you may have to get a puller.
For the other clutch, you won't need to remove the nut, looks like you've got the clutches ready to come out as soon as you get the centrifugal clutch off.
For the other clutch, you won't need to remove the nut, looks like you've got the clutches ready to come out as soon as you get the centrifugal clutch off.