how does Flashpro knows what gear the S2000 in?

does it extrapolates it from some other parameters? (speed, revs, etc)

becuase i don't think we have sensor for each gear (i beleive we only have clutch and reverse sensors).

 

I know for the earlier kpro cars it is based on speed and revs, i would assume it is the same

Try this, get up to high rpms in 3rd or 4th, then shift to neutral, and see if the indicated gear continues to climb as your revs drop.