fuel pump can it ware out
i have a 09 sport it has 4000km on it. one day i was riding it start to spudder backfire low power and seem to be runing on one cylinder so i put two new coils in it.It started up good runs strong, you go for a mile or so it starts doing it againe i took the fuel pump out and took it a part. There was a little bit of junk on the filter i cleand it off .it pumps the right amount of fuel at start up 3.5 0z but is seems like it runs good and till that is brun t up and then it boggie and spudding and backfireing if some one can help or give me some ideas that would be grate!!