Might want to check your CAN bus connection

[UKLee]

I was thinking the same thing but I contacted Stark and showed them the pictures and bam; they didn't hesitate in sending me out a new battery and wiring harness. Should be here any day. I just picked up some ACF-50 aircraft/military grade anti-corrosion aerosol.

I used some of that on the kids mopeds over winter on the salted roads, still had plenty of corrosion. Maybe would have been much worse without it?

 

[UKLee]

I had a closer look at mine today and the news is not good.

I was using a solution of H2O and baking soda to clean up the corrosion. I was using a toothbrush to apply the solution. Unfortunately one of the pins broke off. I'm not sure if the pin had succumbed to the corrosion and broke off or I ham fisted the poor thing. In any case I have aa problem as the connectors are not available separately only with a new battery. I actually do have an old battery but it would be a real chore popping open two batteries to swap connectors.
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The outer "nut" on the center picture is I think supposed to click (over center kind of thing) when it is tight enough, I just checked mine but putting it back on can not get the click, not made easy with the frame brace in the way, needs a bit more force I think. Makes me wonder if this one was not fully tightened hence water/damp getting in.