Yes, removing both seals is easy. The push rod seal, pull out the rod pry out the seal. The factory seals hav a rounded lip around the seal. Replacements this lip is beveled to make installation easier. As Bruce says you need to bevel the hole in the case to help install thre seal without damage.
I use a #3 Phillips head screwdriver as an installation tool. When ready to install the seal, drop a washer on the shaft of the screw driver, the hole should be about the same as the shaft, the outside diameter should be bigger than the seal. Now grease the shaft and seal, slide the seal down the shaft. Now put the shaft into the push rod hole, this keeps the seal straight in the hole, a firm push and it should pop right in.
Changing the bushing before you pop in the new seal is a good idea. I think someone linked the Mike's XS sites instructions on how to change the bushing.
I might add that on the bikes with a two piece rod get the bushing out before trying to get the ball other half of the rod out. They come out easier that way.
A small diameter extending rod with a magnet on it works extremely well to pull the ball and rod out.
Then just put the new parts back in. Push rod last.
The main shaft seal, behind the sprocket, comes out about as easy. Take off the sprocket, there is a sleeve behind the sprocket that goes thru the seal.Slide this out of the seal and off the shaft. Now you have plenty of room to pull and replace the seal. It's made like the push rod seal, a beveled lip on the seal.
Follow Mike's instructions on the busahing and it comes right out.
Leo