For the past week I have been thinking about how to jack the front and rear wheels off the ground on my Zero, in case I had to remove the wheels or adjust the steering bearings. Although I have a rear wheel race stand, there are no stand spools on the swing arm and the angle of the lower portion of the arm gave me a little pause. But mostly, because I don't have a helper to steady the bike for me while I use the service stand to jack up the rear wheel from behind the bike, I resorted to the method that I used to get the rear wheel off the ground on my GPR-S.
After trying several different methods of using my jack stands, I found a 24" steel car tire iron in my garage and stuck that through the gap in the upper and lower swing arm sections, just in front of the large hole in the swing arm. I then (with the bike on the side stand and me standing on the left side of the bike) stuck one jack stand under the right side of the tire iron and lifted the left side of the bike, while using my foot to slide the jack stand on the left side under that side of the tire iron. With the jack stands adjusted so that they are not too high, the rear wheel comes off the ground and the bike remained stable, balanced on the two stands and the front wheel.
I then got out my hydraulic floor jack, placed a piece of plywood on top of the jack's lifting dish to spread the load across the bottom of the bike and raised the front wheel off the ground. However, you have to position the jack lifting point so that the bike does not tilt to one side or the other. When lifting using the jack, watch for tilting and if you start to see the bike tilt to the side, just readjust the jack' position.
Attached are photos showing how this works.