Bafang Ultra Motor (M620) Ridden Very Gently for 3,000 Miles - Service Required or Not Necessarily?

[PCeBiker]

here... 9 bucks and you get a whip with good leverage, a second freewheel tool and a cassette tool to boot.

Amazon.com

I don't need a chain whip. That's for a cassette.

I just need to step on the pedals to tighten up my cassette.

I may need to shorten my chain a link or two?
I'm going from an 14 tooth small cog to an 11 tooth.