After 2 rounds of the 1989 World Championships, both the 500 and 250cc classes were meeting all the high pre-season expectations. The United States GP at Laguna Seca provided excellent racing. Wayne Gardner and Kevin Schwantz (Suzuki) were hoping to win. Eddie Lawson (Honda), Randy Mamola (Cagiva), Christian Sarron, Kevin Magee (Yamaha) were also looking for good results at this event. John Kocinski (Yamaha) was back on 250cc duty. Jim Fillice (Honda) was out to stop him. The sidecars were in action for the first time in 1989. Would reigning champs Webster and Hewitt beat arch rivals Biland and Waltisperg again?