R1AZZA2010

Hello, I'm hoping someone can shed some light and help me out a little. I have a 2000-01 Yamaha R6 , which starts ok-ish first time around on the choke however when it gets warm or go to ride off it cuts out. It'll not start again without the choke being on , but even when hot or cold will not ride , just sounds like its going to stall then actually does. Any advise or information would be great , thankyou.