Join Date: Sep 2007
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Front Brake Issue
Ok, full story, be patient. I wrecked in July, 07 CBR600rr landed on right side, broke front brake lever and foot peg off, scuffed the right fairings up pretty good, bent throttle cables. I replaced the levers with ASV's and install went on smooth. I mentioned in another post about the banjo fittings leaking at the lever and I tightened the bolt and no more leaks. Brakes felt and worked great, that is until the other day. Buds n I were riding and five minutes into the ride we take off from a stop sign and it starts to slow as if I was losing fuel, I gassed it and it got slower, my buds swerved to miss me b/c now it was stopped in the middle of the road, as I pulled in the clutch she locked up no moving. As I tried to move out of road I noticed the front tire was locked up. Brake lever was hard as a rock. We bled some pressure of the lower right caliper bleeder and all was fine. We were on way to bike shop so we continued w/ no issues. The mech said he had no clue why it happened especially since it was working now.
I've since talked to others and possible reasons are 1) Trash in the system could have clogged a port in the caliper not allowing fluid to return which caused the fluid to heat up expand and force the brakes to compress. 2) The new levers will sometimes need to be shaved down where they press against the piston in the master. Often the misfit lever applies just a small amount of pressure to the brake. This "drag" will cause enough heat to build up and eventually lock the brake.
I tend to lean towards #1 b/c I've ridden further and harder on the brakes w/ no issues. Solution recommended to #1 was to back bleed the brakes and it should force the trash out the reservoir.
Any Ideas or advice???