This is a "because you can" excersize, isn't it?
For if you would get real, you would use the info on the A/F ratio bar to tune the carb on the bike itself, not to correct it with a bypass fuel injection system.
Or ditch the carb altogether and fit a decent injection throttle boby. (ever thought of fitting a BMW oilhead throttle body & injector?).
Anyway, nice work and a great way to pass the time!