Peel resident Andrew Pitt could only finish seventh as the World Supersport Championship returned at the weekend following its summer break.
Championship leader Cal Crutchlow won at the Nurburgring in Germany to extend his advantage over Eugene Laverty to 22 points.
Laverty came second with Spain's Joan Lascorz taking third spot.
Defending champion Pitt has struggled to regain the form which saw him top the standings last year and he lost more ground as he looks to defend his title.
He lies seventh in the standings, 116 points behind Crutchlow.
No wish to sell or cease operating, says Onchan Raceway
Hockey: Dunn and England begin junior world cup campaign with draw
Motocross: Double championship victory for Torrin Lennon
Athletics: Ollie Lockley finishes on Podium in Leeds
