I sold my 07 800r 144 X Rev that i loved, it ran just plain kinky for me. Anyways for some weird reason i jumped ship, and now have a 07 RMK 600 sittin in the garage. A 685 is in the future, most likely next summer (if the XP bug doesn't catch me), BUT.... Is there anything available for the imediate future, High Compression head? Hello Kelsey? RK-Tek? Help me out. Or is there anyone porting the cylinders, and millling the head on this sled? I need some power for this utah pow.. Fast, its coming!