First of all, check that loose nut! Secondly, there are two pair of barrel adjusters on either side of the Gyro, spin those out to take the slack out of the cables and the slop in the gyro. Screw them out evenly and only far enough to quiet the noise. Gyros are a very impercise piece of equipment, there are barrel adjusters all over the place on a gyro cable, try them all to get the slack out. If all else fails, just take the thing off, If you're braking you're getting passed! Who needs to stop anyways? That's what walls and trees are for.