Two completely different 990 Dukes
Different engines
2005-2013 990 Super Duke was a 999cc 75° V-twin — KTM's first big V-twin naked. 2024+ 990 Duke is a 947cc parallel-twin (LC8c) from the 890 Duke family. Same nameplate, totally different bike. KTM reused "990" because the new bike's displacement is closest to the old V-twin and the marketing team wanted continuity. Unusual move.
Why a parallel-twin in 2024
Cost & emissions
Parallel-twins are cheaper to make than V-twins (one cylinder head not two, one cam train, simpler exhaust). Easier to package and to homologate for Euro 5+. Yamaha (CP2), Honda (Africa Twin twin), Aprilia (RS660 660cc), KTM (LC8c) are all on parallel-twin platforms in 2026. The V-twin era is over outside Ducati, Harley and Indian.
vs 890 Duke (sibling)
+18bhp, +13Nm
890 Duke ($10,099, 105bhp, 92Nm, 169kg dry) vs 990 Duke ($11,999, 123bhp, 103Nm, 179kg dry). +18bhp and +11Nm for $1,400 more — and 10kg heavier. The 990 is the bigger-grunt mid-flagship; 890 is the lighter, sharper handling option. KTM markets them as different bikes for different riders, not displacement walking.
vs 1390 Super Duke R (flagship)
−67bhp, −$3,500
1390 Super Duke R ($14,999, 190bhp claimed, 1350cc V-twin, 200kg wet) vs 990 Duke ($11,999, 123bhp, 947cc parallel-twin, 179kg dry). The Super Duke R is 67bhp up but $3,500 more, 21kg heavier wet, and uses the old 1350cc V-twin. The 990 Duke is the smarter buy for road riders — sharper handling, modern engine, all the electronics, 99% of the riders won't notice the missing 67bhp.
Real cost trajectory (the 990 nameplate)
−25% real
2006 990 Super Duke: $8,799 ($14,800 today). 2026 990 Duke: $11,999. The new 990 Duke is significantly cheaper in real terms — partly the parallel-twin cost saving, partly the more competitive 2026 mid-naked market. Note that 2006 was BEFORE Euro 4 emissions cost; 2026 includes all that on top.
Rider aids count (2006 → 2026)
1 → 12+
2006 990 Super Duke had ABS as the only rider aid. 2026 990 Duke has cornering ABS, IMU-based traction control, anti-wheelie, slide control, ride modes (4), quickshifter+ option, 5-inch TFT dash with smartphone connect, cruise control, KTM Race-On launch control. The shift on rider aids is the single biggest 30-year delta in motorcycling.
Cheapest way in
$3.5k (990 Super Duke)
If you want a "990 Duke" cheaply, find a clean 2007-2013 990 Super Duke. 120bhp V-twin, raw early-electronics, that classic LC8 howl. $3.5-5k buys you a tidy one. Pay attention to clutch slave cylinder, water pump, and front brake master cylinder. The 2024 990 Duke is a different bike and isn't going to be cheap on the used market for years.
