Hey sorry if this has been posted before but I came accross the parts catalogue on Yamahas site. It gives you the part numbers and a diagram of the parts for Most Yamahas. The Stryker is listed as XVS1300cu. Not sure but it might come in handy sometime.
http://www.yamaha-motor.ca/partscatalogue/
Donto
http://www.yamaha-motor.ca/partscatalogue/
Donto