is that not just a dual sport?
That's actually an interesting question. I generally consider a "dual sport" a kinda/sorta dirt bike with perhaps a little more displacement, a little more power and road legal DOT accoutrements. ADV, at least to my thinking, flirts a little more with touring in that it's the next level of displacement and power, more "slab-ability" as well as more passenger and/or luggage accommodations.
Put differently, I could see a 250, 350, 400 or perhaps even 500cc "dual sport" but not ADV bike ... at least not by my notions of these monikers. All that being said, once you get to a DL650, the lines start getting blurred. While i could certainly ADV on my beloved DR650 - I consider it more of a dual sport.
Just my two cents.
IBA # 72864
Current Fleet: '19 FXLR; '18 Road Glide; '10 Road King; '08 Fat Bob; '16 Bandit; '13 DR650SE;
Formers: 16 883N Iron; 08 FLHT; 08 BMW R1200GS; 07 FXDB; 06 Concours; 06 RKC; 04 Bandit (R.I.P.); 00 Night Train; 03 FLHR; 00 FLHS; 48 Panhead; 99 FXDX; 97 FLSTF; 95 FLHS; 98 BMW1100GS; 86 GSXR-1000; 84 Suzuki 850; 80 FLH; 80 Fat Bob; '04 FLSTC; '08 FLSTF; 08 KLR650 (R.I.P.); 09 CONCOURS 14 - 156h.p. 150++ mph and a few others ...