How to remove speed limiter on my Amazon bike?

I just found something , I pressed plus and minus to get into special menu . Then I pressed minus and power button and it brought me to new screen called C and underneath was 0000. I could change the value of the 4 digit number to anything. Why was it at 0000? Is it safe to change it? I wondered maybe the value is meaningless unless it is changed. I am worried to change it. If it is speed setting that is sort of ridiculous , as if it gives option to change speed to 9999 km/h.
 
On my ebike pressing +/- together allows entry to advanced settings. First, though, is the 4 digit password. Default original password is usually found in owners manual.
 
I didn't set a password for my KT controller because I didn't want to forget it.
The password for my Voltbike is 1919

There's a song about it from the 80's 😂


I keep remembering that song when I'm entering my password, so now I won't forget it.
I try to enter it as fast as he sings it in the song. 😂
 
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