Hi Ive got a brake problem. I just got this bike and when the bike is i motion sometime the front brake doesn't work. The brake Lever becomes spongy. And other times when the brake lever is squeezed the brake feels firm. Is there anyone know what that could be.
j

 

I would bleed the brake line. If you have any air trapped in the line, you can end up with the spongy or no brakes at all.

Make sure you use DOT4 (not 3) brake fluid.