Well, I took the bike out on the freeway this weekend. Brought it up to 115 mph @12k rpm... I think I ran it low on gas cause it stoped running when I exited...Started it back up and was running really erratically, low idle, only thing I adjusted was the idle speed knob. Then realized it was way low on gas...filled up with premium just in case....but still runs like crap until I get up around 4k rpm... What do ya'll think it might be?