Having the lever/master-cylinder upside down is the issue.
Most brakes have the port that passes fluid into the line at the bottom of the reservoir.
If you have the lever upside down then air is closest to the port instead of farthest.
The isn't too much of an issue but if your pads have worn and the fluid level in the reservoir drops you WILL suck air into the line if the lever is pulled.
People love to pull brake levers. W/O fail if someone walks into a room with a bike they can not resist pulling the brake levers.
Brake levers are to mt bikers as Catnip is to cats. (almost)
Most brakes have the port that passes fluid into the line at the bottom of the reservoir.
If you have the lever upside down then air is closest to the port instead of farthest.
The isn't too much of an issue but if your pads have worn and the fluid level in the reservoir drops you WILL suck air into the line if the lever is pulled.
People love to pull brake levers. W/O fail if someone walks into a room with a bike they can not resist pulling the brake levers.
Brake levers are to mt bikers as Catnip is to cats. (almost)