i have a k8 600 with about 9k miles on it. just installed a pc3 and full yoshi TRC exhaust. and since ive put the pc3 and exhaust on i lost about half of my bottom end power. the bike has been running like crap since i put this stuff on. tonight i went to start it up and it started fine then got to about 4k in 2nd gear and the bike felt like it wanted to die. at the next light (about 2 blocks) i reved it up and noticed a huge flame come from my exhaust. i did it again just to make sure it wasnt random and it kept happening. it also shoots flames when i upshift... any ideas? i was guessing im gona need to change the spark plugs. anyone have any other ideas that may help me out??