A man riding his Harley Davidson motorcycle was thrown off at high speed when a malfunction in the cruise control system caused the motorcycle to accelerate uncontrollably to a speed where the motorcycle became unstable and threw the rider to the pavement.  The man suffered multiple injuries including a fracture of his left wrist and severe abrasions over much of his body.  He was hospitalized for approximately six days. The uncontrolled acceleration and instability were attributed to defective product design.