Don't get me wromg, I wish I owned it by the way.
Unfortunately the Slider numbers continue to dwindle away, honestly I don't know what the answere is, although I do have a theory.
I - They take a while to master, if you're not prepared to ride one at full throttle you can & will look like a gumby.
II - Get it wrong and the repair bill can & will be high.
III - They're not being ridden at open meetings, hence viewed as the unknown art.
Short Circuit ( Dirttrack ) was built on modified bikes and I don't mean engine performance alone, that's a gimme in all forms of motorcycling.
What I'm talking about is, chopping frames, changing forks & rake angles, lowering, lengthening, swingarms & wheel sizes, the Slider came in at the end and refined the art.
Times haven't changed a whole lot but back then everything was done to a budget, the big manufacturers weren't really interested in DT.
Hang on, that's still the case.