Honda CBF600S 2006 Owner's Manual page 116

Do not depress the brake lever when the
wheel is off the motorcycle. The caliper piston
will be forced out of the cylinder with
subsequent loss of brake fluid. If this occurs,
servicing of the brake system will be
necessary. See your Honda dealer for this
service.
(4)
(3)
(3) Axle pinch bolt
(4) Front axle
102