I know some people say there is no need for a tach on the savage/S40 (and they're probably right) but, what can I say, I like data
I even read a review of the S40 with itemized features, and under the heading of "Tachometer" it just said "not necessary".
But, apart from riding dirt bikes as a kid (30 years ago) this is my first bike. I got it about 5 months ago. I've changed the muffler and re-jetted and have been learning all about the bike. I was pretty sure I was riding in a way that gets the most out of it, but I wanted to get some numbers to confirm what I intuitively felt was going on.
It turns out I had the idle set pretty well at about 1200 rpm, and my shifting was pretty good, although I do tend to push the bike a bit - I'm ok with that, I like the feel of strong acceleration!
So, maybe I don't need a tach, but there's a lot of things I don't need which are still nice to have
The bracket took longer to make, by a long stretch, than it took to connect the tach!
As a noob, I have to say this is a very satisfying mod to do. I'm very happy with the results.