It's not too difficult. From the SPROCKET SIDE, remove the cap. There is a pin that goes through the shaft. I don't remember if you have to punch that out or not, but I DON'T think you do. Next, on THE KICKSTAND side remove the small diameter steel ring that goes around the workings. Don't break this as they are difficult to replace. From the SPROCKET SIDE use a short piece of broom handle or the like as a punch and smack the thing out with a hammer. You can do this with the chain guard and sprocket in place, just work through one of the openings in the sprocket. Once you do this, you'll be surprised how easy this task is.