I plugged a stock Dunlop once and rode it 35 miles home on Friday afternoon. I checked the air pressure on Monday morning it was still the same. I then rode about 45 miles to the Dealer and got a new tire. No problems. The guy I bought my new tire from said he picked up a nail in a brand new tire and rode it until it wore out before he replaced it, but that was on the big SV...1000 I believe, not a Hayabusa.
Hope this helps...that is the only experience I have had with plugging a tire on the Busa.