My CBR keeps embarrassing me. The bike starts up great with choke and runs fine for several minutes or about 5-10 miles than it feels like an air brake is holding it back as it dies. I roll the throttle and it doesn't respond. I pull off the road for maybe 5 minutes and it starts up and throttle has plenty of response. I roll it hard because i have to enter back on the highway and entering faster is usually the best way to safely achieve that. However several miles down the road I am looking like the fool as I am sitting and waiting to repeat the process. I have changed out the plugs. I have changed the petcock a few times first time was a new "China" one = Junk. so I bought a used oem one off ebay. and it seems to work I think. I have tried riding with the fuel cap not locked down and it seemed to improve some. But there is still something throwing the kybosh on my bike? I ride it without the fairing now because I may have to work on it. I have a new rectifier and a new sweet lithium battery.(that works awesome) new vacuum line, new fuel line, new K&N air filter, new cables, etc.. Oh yea and a Jardine slip on too. I just want to ride without mechanical worries someday. I have the need, to ride! Thanks for taking interest in my situation I really do appreciate any advice, thoughts or suggestions.