In search of the holy spark

I quest upon all ye mighty to hear my tale and perchance helpest me outst.

My Z1000 83 runs superfine, then last time I was ending a ride the
speedo, which is not standard but well installed started flickering, as in
the lights flickering. Now when I try to start it there´s no spark, at first the rev speedo light flickered a bit, seems connected to the ignition because
I got grunt or two from the engine but then it´s dead. Battery is fine but
spark just gone. Fuses are ok as well...

Will check giver but I think it´s a screwed or loose connection somewhere,
NOW where would you start checking?