rider Shoya Tomizawa is killed in Misano . 2010: Moto2 engine capacity is restricted to 600cc 4-strokes. 2011: MotoGP rider Marco Simoncelli is killed in Sepang . [7] 2011: Suzuki withdraws from MotoGP at the end of the season. 2012: Moto3 250cc 4-stroke single-cylinder class replaces the 125cc 2-stroke class. 2012: