Changing front and rear disc and rear piston on Honda CB500F

The amber "ABS" light on my Honda CB500 had been glaring for weeks. Surprisingly, the braking wasn't bad—the bike still stopped smoothly—but the warning light refused to budge.When I put the bike on its stand, the issue became clear: the front and rear disc calipers were completely worn out. They had simply reached the end of their lifespan. While they still functioned, they were well past the point of legal compliance. With my mandatory MOT test around the corner, that active dashboard light meant an immediate, automatic failure. I had to replace them immediately.My driveway became a temporary workshop. Armed with basic tools, fresh fluid, and new caliper assemblies, I swapped out the old units and carefully bled the brake lines.