[naz]

there should be a section in your owners manual that tells you the max speed for each gear.. in my 2000 zx3 (which i think has the same gearing as your car?) i believe it was 1st gear 30mph 2nd gear 60mph 3rd gear 90mph

its not a big deal if you bump up against the red line a few times. i would worry more about 'banging' the transmission into gear (i suppose that isn't a big deal in a stock focus), and downshifting past the redline (you'd need to be really out to lunch to do this!!!).

have fun and welcome to the site!