Handling and lowered bikes

I could throw my old 1990 bike around no problem, handled really well, but my new bike is a lot lower and handling has gone right out of the window.
The forks are 1 1/2 inch lower for some reason (with inserts to stiffen the springs), and the back has Hargon shocks which are a lot lower than my old Koni's.
Is it normal for lowered bikes to be bad at handling?
I think I will switch the forks and shocks over.

Any one know about replacing the seals and re-building Koni's?

[Phil]

Yes, yes & no. Yes lowered bikes do not handle well, yes switch it back, no don`t have Konis here.