How often should I change my front fork oil on my CB550K / CB550F / CB500K? Common Motor December 17, 2018 05:58 Follow Every 5,000 miles / 8,000 km or once a year, whichever comes first. Related articles What type of fork oil and how much fork oil should I use in my CB550K / CB550F / CB500K? What is the correct tire air pressure for my for my CB550K / CB550F / CB500K? How often do I need to change the engine oil on a CB550K / CB550F / CB500K? Comments 0 comments Please sign in to leave a comment.