I have a cylinder that will not run, I have checked every thing in the ignition system and have removed the carb and intake, and have removed the top and center parts of the valve cover but have not found any problems. Does any one know if it is possible for the gear on the cam to move and screw up the timing? The front cylinder runs because I set the timing with that cylinder but the rear one is dead. If its not the cam then I am at my end! If any one has guess I am all ears.... Thanks!!!!