I have searched the forums for a easier way to add fork oil without removing the caps. I'm not really a wrench but my buddy is pretty good. My friendly HD mechanic always uses a vacuum pump to put oil in Harley forks that have air. We did the same on my Wing. Just pulled the right side fairing off and took the air line off to the forks. Opened the TRAC valves full and sucked it in. You do need to be real quick removing the fill tube and replacing the plug. I thought this might be helpful to others.