IF it is a typical dual A-arm setup (im not firmiliar with that quad) u can look on the spindle where the baljoint connects to the A-arm loosen that bolt and u will notice that the bracket wich the bolt u just loosened passes thru has a slit through it ( on the spindle not the A-Arm),then take a decent sised chisel (Or thick screwdriver) and seperate that balljoint housing slightlymaby 1/8th inch more than it already is, after doing this Do just as TRX2fiveO said and hit it with a decent sized hammer ( i suggest puting a block of wood between the A-Arm and the Floor so that the ATV doesent fall to the ground) GL and let me know if this works, But as said before pic's would help