You need to "support" the bike under the engine, more than "jack" it up, as the bike normally sits on the centre stand and FRONT wheel.
I just have a short length or 2x4 that fits under the exhaust so that I can remove the front wheel. Once the front wheel is off, the bike then sits on the rear wheel and centre stand, so there is very little weight on the 2x4 when pulling the wheel and none once the wheel is off.