This Upper Shock Bearing would not work in the lower part of your shock or linkage. We do sell the All Balls Lower Shock bearing for your 2013 Kawasaki KX250F. There are also linkage bearing kits and swingarm bearing kits available from All Balls for your bike. Also, all the individual stock bearings for your bike would be available in the OEM Parts section for your KX250F as well.
[ http://www.motosport.com/dirtbike/ALL-BALLS-LOWER-SHOCK-BEARING ]