Not sure exactly what you mean by "smoothly"....
Vibration at high speed one thing....
stuck to road over bumps, not bouncing when hitting holes, etc?

Let me just offer this....
My 1995 850T, 135K miles, was loose...not handling like I thought it should. It was vibrating slightly at high speed, and not handling bumps Like I thought it should....

I replaced the struts, strut mounts, A-arms (have ball joint), tie rod ends (balls joints here too), sway bar links and rear shocks. Did this all myself, took about 4 hours wheels up to wheels down. total cost for everything was about $750, plus my time....

THe sway bar links take about 30 minutes to do, and the parts cost $25.00 a pair. I used Bilstien Heavy Duty struts and shocks, although the rise is a bit stiff, I prefer it to stock. eceryting else avilable via links on brickboard.

hope this helps....email if questions.
alan.