If only it had 6th gear..
Join Date: Jul 2011
Location: North of Boston
Air could get if a seal is going bad or porous. Usually you'd see brake fluid seeping somewhere but in some cases it could suck in a little bit of air, usually down by the wheel cylinder on the caliper, after the brake is released. The air bubble you mentioned in the glass is a sign. But your lever should still have some feel to it. If it moves freely like its disconnected, I'm thinking its your master cylinder. There's a piston in there that directly contacts the lever. It could be stuck in. Sometimes a caliper could be frozen in the open position but again you should still have feeling in the lever espescially since our bikes have dual calipers. Its more common that they freeze in the closed position, cause drag and overheat the rotor, brake fluid and everything else but I'm sure you would have noticed that. Good luck and I hope this helps. I'm sure if I've mis-stated anything someone will help out and may offer tricks to test the components that I don't know about. No brakes is scarey. Glad nothing bad happened to ya.
Last edited by DavesVulster; 07-22-2011 at 08:25 AM.