hi everyone im hoping some one here can tell me the reason why my bike does this it starts and rides fine but when the bike is hot it will sit there and pop when i get to my destination or even just pulling up at a set of lights here is a video of it

 

www.vtr1000.org • View topic - backfire valve timinig ???????????????????

 

thats the one i started on that page

 

what's your jetting like? Has it been jetted for the pipes? Could be a bit rich or lean, either could cause popping.