Bike cranks over without ignition on ?!

Hi all , Ive just been replacing my Motobatt with the same model , but as I reconnected the neg the bike started to crank over on its own !!? Without the keys in even … afterwards I recalled that when I tried to start up last it wouldn’t stop cranking and then died ?? Is the solenoid stuck in go mode ?

Bike now runs and I have ignition back to normal , however she will only tick over at 4-5-6 thou !? Any ideas ??

I would love to help mate but no idea .
Hope someone else jumps in .
Regards Brian