I've got a 99 YZ400. I want to gear down for woods riding and ordered a 13T CS sprocket after reading a lot of the gearing posts here. Anyone have any advice on making the install easier? 1) I know the keeper on the nut is one of those bent flange arrangments. After straightening these how hard will it be to break the nut loose? What's the best way to hold it still? engine compression? apply rear brake? I figure it should be any easy job but if any of you all have lessons learned the hard way lets hear them!