The 2018 Kawasaki Ninja H2 SX has 6 recalls, with the most serious risks being rear wheel lockup, sudden loss of drive, and engine stall, any of which can cause the rider to lose control.
Two recalls address the rear wheel. A shortage of grease in the rear hub needle-bearing or the rear wheel bearing can cause either bearing to fail over time and lock the rear wheel without warning. A related pair of recalls covers the engine control unit's handling of gear misengagements: if the transmission jumps out of gear, engine speed can spike before a gear re-engages, damaging that gear and potentially leaving the rider unable to shift or causing the engine to lock up. There is also a recall for an engine stall that can occur while riding. On the structural side, the center stand spring can detach and allow the stand to drop to the ground while the motorcycle is moving, which can catch the pavement and cause a sudden loss of control.