TPS: For some time, I have noticed snatchiness at low speeds. The dealers checked it for me at the 12,000 km tuneup, including the TPS setting (or so they said). They said "all normal", but I didn't think so. I checked the FI settings using the dealer mode switch and noticed it said "_C00". The factory manual and Haynes manual all say that "C00" is normal, but the position of the hyphen is not discussed .
Overseas forums for the Bandit and other Suzukis (GSX650F/GSXRs) all indicate that _C00 (or the same but the hyphen in the upper position) indicates the TPS is out of adjustment. The ideal is -C00, with the hyphen in the middle position.
Can I adjust it? With a Suzuki SDS unit, yes. It is also possible to manually adjust it by slightly moving the TPS unit on the left side of the throttle bodies. It takes a Torx T20H security bit (with a hole in the middle) to slightly loosen the unit and adjust it by hand until -C00 shows. It took me about 15 minutes (it's very sensitive) and checking on the SDS shows it is spot on, so this obviously works.
Throttle body sync
I used a Morgan Carbtune:
It's fairly straight forward. Tank on blocks, run bike until it is hot and the fan is coming on. Turn off. Connect dealer switch:
Switch on, and bike will show -C00. Disconnect The IPA sensor (number 1) and the 4 air hoses to the throttle bodies, replacing with the vacuum tubes from the Morgan Carb Tune. Restart bike in dealer mode, which will show C13 (IAP Sensor disconnected).
Adjust air screws until all cylinders are the same (using number 2 as a guide). Reassemble.