Alright so I put a m4 slip on exhaust on my 07 r6 and a K N air filter. I took it out rode it for about.. 120 miles. Everything is going good i turn down my road and i noticed my power seemed to be kinda sucky, so i was riding about 10- 15 mph cause i live down a dirt road and it came to a puttering stop then the engine light came on. I shut the bike off then turned it back on and then the light was gone. The bike still was kinda weak. About an hour ago i took my bike to a buddies house, i came back to the bike .. started it and it just shut off by itself after 15 seconds of running. Turned it back on and it was fine. I took off and the bike has like a hiccup when i accererate slow sometimes hard. What the hell is going on i mean i only have 3800 miles on it. Could it be the plugs? Can anyone help me out?