I need some help- With the Spyder (SM5) in neutral and the parking brake off (so as to roll the bike forward and back), the rear wheel emits a sound exactly like a whale's mating call. Clearly, it is the brake rubbing but I cannot seem to get rid of it. The metal stop for the parking brake will not allow adjustment beyond that point and I am just not schooled as to how to adjust the rear brakes. It is certainly creating resistance to the travel of the wheel at all times. Interestingly, my mechanic told me that the brakes cannot be adjusted as they are hydraulic- I just picked the thing up yesterday. Just to be clear, the sound occurs at a particular point in the rotation of the wheel. Just think of the whale call and you have the picture.