I wore my speedo pickup wires threw last summer. Rode without a speedo for some time. I recently resoldered the wires and added a bit more preventative heat shrink and tied them back so hopefully this does not happen again. well I took a rip and speedo just reads 0 I trust my splice so started poking around and I cant find a magnet in the brake rotor. I took a look at a parts schematic and no magnet there either.:huh Anyone know what signals the sensor that the wheel has made a rotation?