http://www.oemmotorparts.com/oem5.asp?M=Yamaha&T=BT%20BULLDOG%20%201100&Y=2005&L=YA-BT-1100&O=STARTER&F=YA-BT-1100_AP&L2=YA-BT-1100_AP
Here you can buy a little bit cheaper.
It's a typical modell error with BT 1100 and Drag Star. I've used the 3rd one.