Hi I’m thinking of replacing my standard speedo on my 2000 Harley Davidson FLSTF Fatboy with one of these speedo / tacho and wondering if anyone has usd one of them before?

Not that exact one but one that looks very close to it on a 2006 wideglide, if you are concerned about anything in particular feel free to post it up but honestly they are easy to install and work just fine. 

So they don’t plug in and transfer what km’s are on the original speedo when installing them ? 

I believe on older bikes, i think pre injected, the dealer has to change the Km on new speedo to match your original.

Like Steamer said later ones you can change, there is a time limit on doing it, that won't worry you, as for the older ones like yours I didn't think they could be, maybe I'm wrong there though.

Also you might want to read this.....

Yeah had read that too which makes me wonder with the plug in it transfers the km’s over 

Pretty sure it don't mate, here is the Parts Outlet listing for the same gauge, it actually says it doesn't, I wouldn't let it stop me and I didn't when I fitted one years ago, just giving you a heads up.

So you are saying it wouldn’t let you transfer the data across from the original to the new one ?

That is my understanding, you could always ask the dealer if they can do it but everything I've read either says no outright or alludes to it with legal warnings about disclosure of original odometer reading.

Maybe I would just need to keep a record of original mileage when I changed it over if I decided to proceed with the idea 

I put a combined speedo/tacho into a 2008 Softail Custom in 2011.