Buy a front wheel stand you can push the front wheel into. I swear by Condor front wheel stands. Leave rear wheel on pavement. You should not need a pneumatic impact wrench. Use a Propane torch to slightly heat just the nut after flattening the tabs on the lock device under the nut. Use a 1/2 inch drive torque wrench and six sided socket. It should loosen. If you use an impact wrench, set at lowest setting, do a couple short bursts. If nut does not move, increase to next setting, do a few short bursts. Just until it begins to slightly move. Impact wrenches can easily damage the shaft threads or destroy them.
1993 ZR-1100 Zephyr(modified by Zlock Racing to 1322 cc, Lindemann Engineering modified/rebuilt forks + rear shocks)
1996 ZX9R Ninja, Race Tech Susp., Ferodo Brake King Ultra Light ductile iron full floating rotors, Nissan radial brake master cyl, Galfer lines, Corbin seat, OEM exhaust.
2006 Vulcan 2000 LTD. All stock.