as far as i know the swingers are the same on the 84/85 models, the two i have are identical, ones and 84 model the others off the 85 model. the hubs are different, 84's are 4x4 bolt pattern, 85 runs the 4x156 bolt pattern. the axles should be the same...so you should be good to go.
1985 KXT 250 Tecate - kx cylinder, kx ignition, bassani headpipe, answer silencer, v-force reeds, 38mm airstyker carb, +2 franks swinger, raptor rear shock.
1996 YSF240 Blaster - maxxed out!!!
Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "HOLY SH-T, what a ride!"