The Jumping Jack Yamaha

Yamaha XSR 900 - Bike gear upwards inwards retentivity of JACK MIDDELBURG past times GILEX CLASSIC MOTORCYCLES in cooperation amongst YAMAHA in addition to RTL GP magazine

Jack Middelburg was a Dutch professional person Grand Prix motorbike route racer. Together amongst Wil Hartog in addition to Boet van Dulmen, he was business office of a contingent of Dutch riders who competed at the highest levels of Grand Prix racing inwards the belatedly 1970s. World Championship, where he was noted for his impetuous driving, in addition to then much to deserve the nickname "Jumping Jack" (from the vocal of the Rolling Stones Jumpin 'Jack Flash).

In 1981 he pulled off an unexpected upset when he defeated the defending globe champion, Kenny Roberts at the British Grand Prix at Silverstone.