that it be

 Def a kink. Poor instalation if I do say so. Shouldn't have let a first timer turn wrenches on this sick set up.

 Yes, it is a kink. Actually its from pinching against another riders bike on a shuttle up our local trail road. First timers do make mistakes, but i dont think anyone would be "first timer" enough to put a big crimp in the brake line....
Nice try though