I put a set of spools on the swingarm and got a set of adjustable racing stands from t-rex and they work good. I bought them back when I had a 250 and they fit on the Z1000 as well. They were fairly cheap & definitley worth investing in. Makes cleaning and maintenace sooo much easier.
I once used a very carfully placed car jack on a Honda 919, but it was not very stable, but it worked.