2004 Kymco Super 9 tach troubles. Ugh I know

[Winner3ty]

Tach Troubles, electric boogaloo. After doing lots of careful research, I have learned 2004 Kymco Super 9's are famous for having their tachometers go bad, so after alot of trouble shooting (such as using the same as stock spark plug) or looking for pinched wires, I found this. and just fyi if you ask if its trying to return to 0, if I return the needle to 0, it goes back to where it was. Any thoughts on this guru's of Kymco Forum. Has a solution been found? and yes Im using the original spark plug, here's a video of the tach here: https://www.youtube.com/watch?v=us8O7qlGMwA
I tried returning the needle to 0, but it always returns to where it is, and jumps around. I'm leaning towards bad signal or coil touching. Thanks for any advice guys!

[JJJoseph]

Is it only that the needle is pointing to the wrong place?  Otherwise, is the needle moving as it should? The tachs are just simply coils with a slider that moves the needle.

[Winner3ty]

Is it only that the needle is pointing to the wrong place?  Otherwise, is the needle moving as it should? The tachs are just simply coils with a slider that moves the needle.

When I moved it to 0, it returns back to where it was. I put the dash back on now the needle isnt doing anything. there was a 24 pin micro controller on the board that I noticed

[JJJoseph]

I've occasionally replaced a u/s factory tach with a $15 Chinese tach.  It's the quickest solution.  Not perfect, but workable. There's many models, and they don't come with instructions but, being Chinese, they all are wired exactly the same.  So I've attached the wiring diagram.