And now my engine is bogging like crazy. It seems like it is misfiring. In first gear it takes off good but in second at about 5 or 6k rpms it looses all power then comes back and lost and back, it just Boggs like crazy. Anybody have any suggestions. My bike is a 2000 R6, bought it used a few weeks ago. When I changed the plugs, the guy who had changed then before used the wrong plugs. It runs fine when it's idling. Any conments or suggestions are greatly appreciated.