They're much like any other Dyna of the time with the same 88 ci and 5 speed. The only issue to be aware of (that I know) is the spring loaded cam chain tensioner shoe which is common to all Harley 88’s. The plastic shoes will wear through to the metal backing plate typically somewhere between 25,000 and 70,000 miles. If allowed to happen the remaining broken pieces of shoe material can lodge in the oil pump and lead to major engine damage. So starting around 20k they should be inspected. When they start getting thin (the inner one goes first) you can have them all replaced and the replacement ones will last longer. Or you can chose to have them updated (which is what I did) with the same system used on 96” motors on, which consists of hydraulic tensioners, improved shoes, and a higher flow oil pump. It’s nice that Harley offers this upgrade.
What differentiates the FXDX it is the blackened drivetrain, longer and better rear shocks and springs, longer adjustable forks, twin front rotors, lower bars, mid foot-pegs, and both a speedo and tachometer in sight up on the handlebars.
They never were good sellers here in the US and probably had Europe in mind when they made them. I happened on mine back in 2005 when I was in the local HD/Buell dealer open house. I had gone to look at new Buells, which I was unimpressed by, and was just sipping a beverage chatting with the salesman and I asked "what is your slowest selling motorcycle here?" He said "without hesitation the FXDX Super Glide Sport, there's two over there." One was a 2005 FXDX with cast wheels which just arrived, the other was a 2004 FXDXI with spokes. Long story short I made him an offer on the leftover fuel injected 04, contingent on swapping the cast wheels off the 2005 on to it, which they accepted.
I've enjoyed this motorcycle quite a lot and if one was looking for a Dyna of this vintage it is the one to get IMO. I've toyed with the idea of looking for a nice 2007+ base Dyna FXD, which has the 96" motor 6 speed and 49mm forks, just to make into a newer Super Glide Sport. Would have to install longer shocks and springs, probably a second rotor, and tach. Not sure about the pegs and controls yet.
Here’s a recent photo of mine with a Corbin solo seat.
