The dual front disk brakes on my 84 California no longer work, after I removed the front wheel and simply installed a new tire. The front wheel was off the bike for 4 weeks.
When I squeeze the brake lever it travels to the grip with no resistance at all. I topped up the fluid, bleed the brakes, the calipers and pads look perfect, and new braded brake lines a few years ago. I tried to pump up the bakes by rapidly pulling the brake lever ... but absolutely nothing.
Any advice would be greatly appreciated, as I am no expert on hydraulic disk brakes.