Strong winds and lack of motorcycle experience are believed to be factors in a motorcycle crash that seriously injured a Waupun man. The crash happened Sunday afternoon on Highway M near Amity Road. An initial investigation shows that a motorcycle was traveling northbound on CTH M. The operator failed to maintain control of his motorcycle and entered the ditch and the bike overturned multiple times. The driver was wearing a full face motorcycle helmet. The 21 year old operator was flown by helicopter to ThedaCare Regional Medical Center in Neenah with serious injuries.