Speedometer

hey guy.
Just changed my gears from 3.23 to 3.91. Speedometer way off. Was off in the first place I think.
Anyway of hooking up a digital one? Nothin fancy. Just to stick over the original.

Anyway of powering such a thing off battery? My cigorette lighter does work I don't think

Thanks!
Download Speed box or something similar. Super easy.

Jake