On my gxr1000 I use to have when ever I would cruise at 4600 rpm the bike would shut off on me. After months of it doing it to me and tearing down the whole bike going over the whole wiring harness and taking off my powercommander 20 times to try to find the problem I fianlly found out my problem was the kick stand switch. Theres some old suzuki post about it now. The harmonic vibration from going 4600 rpm would cause the switch to fail. If I went any other rpm I wouldn't do it 4500, 4700 and so on. Cleaned the switch up and it never did it again. I know its a little off subject but for future reference ;D