First I'm not going to bust your ass for not running a Busa like a Busa is normaly ridden, .............when your sitting on the bike kickstand up eng not running, with the bike in gear you pull in the clutch, can you push the bike? if so the clutch is working mechanicly, now put in nutrual, start bike pull in clutch still running tap in gear, is this when bike dies? ck the diagnostic port to ck for fault codes, kickstand switch is the most likely problem, but if could be something else you could try to bypass the switch, unplug the connector at the kickstand and jumper wire it, and see if the problem go's away