2008 Harley-Davidson FXD - Dyna Super Glide, Just traded in! Higher miles but lower price!! Only $5988.00!!! For a Big Twin!!! Get in here!!!! 2008 Harley-Davidson® Dyna® Super Glide® The Dyna® in it purest form, the FXD Dyna® Super Glide® plants Twin Cam 96 power under a solo seat in an agile Dyna® chassis. It's all the motorcycle a rider could want. But this most-affordable Harley-Davidson® Big Twin model also presents the ideal starting point for creative customization.