(This isn't for my bike)
Anyways the bike in question had a minor tipover today. The brake lever was bent slightly, but nothing else.
Shortly after that, front brakes were about 90% gone, meaning the lever would pull back all the way to the grip with 1 finger effort, and stopping power was still there but greatly lessened.
Also the front brake was dragging, so that pushing the bike around in neutral was very difficult.
After about 2 hours, the problem seemed to fix itself. The brake lever feel became firm (normal) again, with the proper travel, and the excessive brake drag was gone. In short, problem disappeared!
My question is... why did this happen? And more importantly, is the brake likely to fade again? It would be very bad if it decided to go away, say at the end of a long straightaway.
The bike is a new bike, so everything was working properly, no problem with the lines or fluid, etc.
The little piston that the lever pushes on did not appear to be damaged in any way, although since the lever was bent, I suppose the piston must have taken a minor impact.
Teetee... any insight? Thanks.