Well, it's not the battery...

[jonathan180iq]

Originally Posted by alantf

This would seem pretty conclusively to point to a faulty sidestand relay. A not uncommon fault on the GZ. Next step is to find the relay (above the sidestand) and check/clean it. :2tup:

:plus1:

That is most definitely your problem. The switch is sticking after the kick stand is down.
There are tons of posts on that issue on the forum. Do a diligent search and be sure to update us here when the problem is resolved.