Harley Davidson fxsti -2004 Published November 15, 2010 at 600 × 450 in 100mph. Daily. 88 Cubic inches of fuel injected “go fast” My trusty steed -a 2004 Harley Davidson FXSTi softail 88 ci (1450cc) TwinCam (twinkie) -the best fro business and pleasure. 100 MPH and not even breatin hard with stage 1 Screamin Eagle on an otherwise stock motorcycle.