My 2000 f4 has been running great. Rode it to a friends house, bike cooled down. Went to start it and it just turned over like there was no gas in the carbs. Finally it caught, but REFUSED to run with any choke on. Once warmed up, bike idles, and pulls like a champ.

Later that day, it did the same thing. Acts like the bike is out of gas, yet refuses to run on choke and is very hard to start.

Anyone have any clue what could be causing this? (fuel pump is good and it is NOT the fuel pump relay )

Forgot to add: At any engine temp, bike will instantly die if you put the choke on.