The first sign of problem will be the bike being hard to start. since you flushed it out you shouldnt have an issue. But if more diesel got mixed into the fuel than you can get away with, itll blow past the rings and get into the crankcase, because a gas engine cant burn it, then it mixes with the oil, then you have huge problems. I know you cleaned it out, but i thought i would let everyone know what happens, that way no one will try to ride home on a flex fueled gsxr with a lower end knock.