Tone,
Before undertaking this, you should decide if you have a good reason to change the "Silent Block" bushes (as they are called), as they are not easily subject to failure. I'll leave it to others here to say if they have had to replace any just for service. As for myself, I was changing from solid spindle to hollow spindle and was forced into the job. I can tell you that I thought it was the Job From Hell. First, I used a Sawzall to split the steel sleeves, as close as I could get to the swingarm I.D. without cutting that. Then, since things still weren't moving, I torched out the rubber. (Not a "green" endeavor. Remember, I am not the one suggesting you do this under cover of darkness.) Then, I was finally able to prise out inner and outer steel sleeves. Then, the new bushes were a bit too large to fit the I.D. of the swingarm, so I ran my cyclinder hone in there for about an hour. Then they seemed about to fit, so I contrived a press made from 3/4" diameter all-thread and some really big nuts. Using about a 22"-long breaker bar, I proceded on one of the sweatyist, most tedious nut turning processes I never wish to repeat. Yes, the bushes got a little deformed on the ends from so much pressure, but not so much that they couldn't be cleaned up. Then, I discovered that the inner sleeves of the two bushes were a bit out of alignment and the spindle would not pass through. Then, I bought an adjustable reamer on eBay to run down through the two spindles to get them to line up well enough to get the spindle through.
So, in answer to your question, "Sure, they can be replaced with no problem!" Seriously though, other folks reading this will, no doubt identify where I went wrong so you don't have to.
Richard L.