fx6

I have a 2007 FZ6 bought new. It started breaking up a while back at about 5k RPM, in any gear if you roll the throttle on after 5k RMP the motor breaks up and there is no power. It feels like an ignition issue, almost like a throttle limiter is engaged and is interrupting the coil sequence...

How do you modify the stock exhaust. I have a 2009 fz6 I've read some threads but can't seem to find the exact details and tools needed. I do have an electric drill but what size bits do I need. Pictures and video would really help.