I purchased my c5 levers set and noticed when I installed the brake lever and started the bike up, the brake light was on without me pulling the lever and stepping on the rear brake pedal. Thought I had to just take it for a test ride to break it in. Luckily coming to a stop light, as I was slowing down, the brakes locked up on me and came to a dead sudden stop. Tried to push the bike to the side of the road but it wouldn’t move. Checked the brake lever and it was already stiff as hell and the lever wasn’t even pulled back at all. Whatever that piece is that tiny piece that clicks when pulling the lever is, it was too much clearance is my guess as to why my brakes were applied the whole time and got tighter until it locked up on me and it had cut off when it came to a sudden stop. I’m guessing this is what we’re discussing here? Luckily I had my tools on me and removed the lever n rode home with my rear brakes. Just glad the cars behind me reacted fast enough to avoid hitting me.