its pretty much straight forward.. remove the cover..loosen the bolt in the middle (14mm) but make sure your bike is in neutral and use a piece of wood or something through the spokes of the wheel to hold it..and after that loosen up the tension on the chain, and gently pull the sprocket off. After that unhook the chain, clean off the area around if you like, then reinstall the new sprocket and reverse the steps.. I dont remember what the TQ specs were, but I'm sure somebody on here can help you. Or search.