Future three-time world champion Rainey absolutely dominated the 1989 USGP at Laguna Seca. His mechanic, Mike Sinclair, had the 1989 YZR500's 35mm Mikuni flat slides tuned to perfection. Magee's YZR ran out of gas a few laps from the end and he had to back off and rock it to get it across the finish line. Rainey's bike went dry on the cool-off lap, just as they planned.