bike is a zx-6r. Removed everything to get at plug caps. Removed electrical connectors. Cannot seem to remove the whole "connector" assembly from the sparkplug. The top part sticking out of the head rotates but pulling up to remove doesn't even budge it. So, I quit before I broke anything and am relying on some kind persons help. How do I remove the plug connector from the head so I can get at the plugs?