took off my American Classic II exhaust from Hard Krome. went to pull off my PCIII but need to raise the tank to remove it, the connections are under there. anyway went for a ride and the bike pulls so much harder. I am going to ride for awhile with the PC on and then pull the plugs to see if it is running to rich. what does everybody think about this, any problem besides running rich? has a lot more torque, bought the bike with these pipes already on and PO did not have the PCIII accessories. one thing I did notice is the bike seems to vibrate a little more in the upper rpms. think leaving the PC on will cause any problems? this is all new to me.