TNK speedo and revs at speed

Hi all have fitted a TNK instrument cluster to my 82' 750. Trying to be a smartass wanted to change the white face to black only to find out after a pulled the needles off that this cannot be done easily.

Now I don't believe that the tachometer needle is installed correctly as idle is showing around 1600.

Am running a 530 chain set and front wheel is original

Q: what should a normal tachometer read at 60, 80, 100k's?

Q: has anybody else uses the TNK speedo on a 750 and was it correctly calibrated for the wheel size and speedo drive.

Might have to do some repositioning of the needles.

Cheers
Stuart
 
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