As you may remember from our previous coverage, things are not looking so good for Zero Motorcycles with several recalls in the past year, including  faulty brake caliper mounting bolts that was issued in August, and a faulty firmware recall that caused certain models to shut down while running.

Now, after an incident with an expert rider in Australia in late February, Zero has discovered that when certain motors are pushed to their limits, the motors rotor may contact the stator, causing the engine to lock up thereby causing the rear wheel to lock up.