Firstly, the bike has half tank of fuel.

The bike (it's fine one day, the next day I have an issue) suddenly becomes difficult to start. When it does start, it runs for about one second, then dies. The fuel pump then recycles, and when it starts again, it will only run for about one second, the pump recycles, etc. Any suggestions? Thanks.

 

could be the fuel pump. I know that the 07's had some fuel pump issues which were fixed with a new improved pump. Perhaps you have one of the early pumps. should be covered under warranty.

best of luck-
Rob

 

Have you checked the computer for fault codes?

 

I want to check for fault codes. What is the procedure? Thanks.

 

Check here.
https://www.hdforums.com/forum/useless-threads/215353-helpful-diy-s-diagnostic-codes-carb-rejetting-instructions-links-dead.html