Hi Lee,
I expect that you have found the instruments of a Z-Four (Z650?)
Red line is about 8.500 rpm or so then.
Should show the rpms correctly.
Just bear in mind the red line with our Twins is at approx 7.500 rpm.
Just place an additional sticker to the tachometer to point out where the red line really is 😉
Good luck !
Cheers, Michael
