Bruce Penhall became the first American to win the World Championship since Jack Milne in 1937.
[6] As a past World Championship winner at Wembley, the 74-year-old Milne was a special guest at the event and saw Penhall end America's 44 year Individual World Championship drought.
Though he remained undefeated until his last ride when he only needed to finish 3rd to win the Championship (he finished that race in second behind his rival Kenny Carter), Penhall was forced to work hard for his maiden World Championship.
Olsen would defeat Knudsen in a runoff for second and third places after both finished on 12 points.
The triple World Champion gaining some revenge on his younger countryman after Knudsen had defeated Olsen in the first heat of the meeting.