You are fine without it, unless you are experiencing an issue that leads you to believe a TBS is indicated.
One trait that the Gen II Busa shares with the old CBR1100XX Blackbirds is that it apparently "holds" it's throttle synch very, very well. On two Blackbirds that I rode over 225,000 miles, I never had to do a TBS on them. Ever. For grin, I would occasionally put the mercury sticks on them to check... the columns were always within mm's of each other.
It's looking to be the same on my Gen II Busa... with well over 30,000 miles, the motor is still like glass. Never did a TBS on it, though I do have access to the proper Diagnostic computer to perform one it I needed to.
Be thankful the Busa has a vastly different EFI system than the Yamaha FJR1300. The FJR's throttle bodies can't maintain its calibration worth a rat's ass. There is a reason that the FJR's Service Manual calls for a TBS on that bike every four thousand miles! ???
Incidentally, that 600-mile TBS check is for CA-spec Gen II bikes only... not for the rest.