I'm not sure what your floor jack is like.
Just a hydraulic ram/piston ( car jack ) ?
I lift my bike using a lift like this:
It go's under the sump and I make sure that it is chocked so that it can't rock from side to side.
Begin lifting the bike while checking that it's stable (side to side).
You can place something like a workbench/table on either side of the front forks or use straps to the handle bars up to a roof beam or lift frame as insurance to make sure it can't fall over.
It works for me.
When the rear wheel is removed, the weight bias go's more to the front.
Good luck.