How do you install a tachometer on a motorcycle?

I want to put a tachometer on my Honda xr650l with a 650 air cooler single cylinder engine how I do it

Hi so why do you need a tachometer these are to display to a vehicle examiner that you have only ridden it intros case for so many hours. It tells you nothing else.
i think you are confusing this with a rev counter.

Year not given. If that bike used to have a tach, just buy the Honda replacement and hook it up.

Get a digital one. One wire to plug wire.

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