Carburetor jetting: Connecting your PC to your bike's ECU to re-program its EFI is too F'in' EZ! Back in the day, we had to remove the carburetor(s), unscrew each float bowl, physically remove and replace the main, pilot and/or needle jets, raise or lower the needle, then reassemble. The Phillips-head screws invariably stripped, we had to use a magnifying glass to read the illegible numbers on the jets and a needle circlip always shot across the room! Gas got everywhere, including on our hands, and there was no washing away that smell. If we were lucky, the bike ran better; if not, we got to do it all over again. We didn't have dynos, either; we gauged performance by the seat of our pants.