Join Date: Oct 2006
Location: phoenix, AZ, usa
I hate to keep repeating myself but this sounds like a bad coil to me.
I had two coils fail within a month on my 06 K12S when I owned it, at 40k miles.
the heat out west probably caused early failure but who knows for sure.
its a sizeable, expensive job (the coils alone are about 115 each, but replace them all if they to the job due to the expense of accessing the coils). I know, I had one fail, had it fixed, a month later another one failed! DOH! the 2nd time, I told them to replace the remaining 3.
when that bike hit 80k miles, I had all the coils replaced during the service to avoid problems and expense.
I bet that is your problem from the sounds of it. If so, be careful, the pipe may overheat and also cause O2 sensor problems due to the excessive heat (my pipe was cherry red inside with a failed coil) if you keep riding it.