My nephew wrecked his cr450f a few months back, and we just got everything fixed, the problem we are having is the front brake grabs immediatly with the skightest pressure on the lever. When you release it, it rolls fine. Changed the rim, rotor, bled it several times with the same results. We even took the whole assembly apart and cleaned it, and checked it the best we could. The funny thing is off the bike, it seems to work ok, as far as putting a disc in the slot and pulling the handle. Thanks Machster "Live well...ride free"