Ok I have a 99 YZ400 F Looks like stock sprocket size is 14 49. Has anyone changed the ratio and if so what did you go with and how did it help or hurt? I am going through my bike and am replacing parts due to the age also am going to be rebuilding the suspension. The front I have no problem with the rear I know nothing...any help on rebuilding? Take is somewhere? Swingarm bushings brand??? Thanks for any input..
