https://www.autonewspress.com/tag/freestyle-stunt-riding-world-champion-chris-pfeiffer/
Freestyle Stunt Riding World Champion Chris Pfeiffer. Archives - Auto News Press
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https://www.magacin.dk/motorcykler/motorsport/chris-pfeiffer-tysk-mester/
Chris Pfeiffer tysk mester - vandt German Open
Jul 14, 2009 - German Open stunt riding
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https://www.ganz-muenchen.de/shopping/auto/bmw/niederlassung_muenchen/2007/fahrfreude_2007/neue_modelle/fotos/streetbike_freestyle_chris_pfeiffer/pages/070321bmw_streetbike44.htm
Fahrfreude 2007 - Streetbike Freestyle Weltmeister Chris Pfeiffer/©Fotos: Martin Schmitz /...
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