What is the spark plug gap for the CB550K / CB550F / CB500K? December 17, 2018 05:54 Gap specification: 0.6 - 0.7 mm (0.024 - 0.028 in.) Related articles What spark plug do I need for my CB550K / CB550F / CB500K? How to set the ignition timing on the Honda CB500K / CB550 Honda CB500 and CB550 4-Cylinder Factory Service Manuals What type of fork oil and how much fork oil should I use in my CB550K / CB550F / CB500K? How to adjust the cam chain and valves on the Honda CB500K / CB550