I lent my bike to a mate for the last few days and he let the tank run dry. When he filled it up with premium and tried to start it it ran really rough and shot flames from the exhaust. I haven't seen it myself cos he delivered my bike back to me on the back of a ute. Bike is a 95 cbr900rr. Never had any issue before at all. We are thinking it may have water in the fuel although looking in the tank it looks fine. Plan is tonite to drain the fuel, replace with fresh stuff and try to restart. Wondering on anyone's ideas or suggestions?