FZS600 has stopped working

[Gnasher]

I tried to start it a few times and eventually with choke on and throttle half open it fired and ran very briefly, but, wouldn't do it again.  This is what was happening just before she died completely and I parked her up.  She would run sometimes but you had ot give it a handful of throttle to get her to run and then she'd die after a few seconds or you held the throttle and she'd backfire etc and eventually die.  She was running fine when I set off  that day and then half way on the journey bogged down and got worse and worse and you had to give her handfuls of throttle to get her to move at all..and then every now and then there would be a surge.  it really felt more like something electrical breaking down...

These symptoms are classic idle circuit blockage and/or stuck starter plungers.