Top 10 Fastest KTM Motorcycles Ranked by Top Speed
TL;DR
- The 2024 KTM 1390 Super Duke R is the fastest street-legal KTM, with a claimed top speed near 180 mph and 187 hp from a 1,350cc V-twin (KTM, 2024).
- The track-only KTM RC 8C tops out near 187 mph with 135 hp — aerodynamics matter more than horsepower at that speed.
- KTM publishes no official top speed for most models; figures here come from MotoStatz GPS-instrumented tests, manufacturer data, and named media sources.
- Naked KTMs are limited aerodynamically, not by power — a Motorcycle.com tester on the 187 hp 1390 couldn’t catch the 135 hp RC 8C on the Portimão front straight.
- The full range spans from 106 mph (390 Duke) to ~187 mph (RC 8C).
How These Rankings Were Determined
KTM doesn’t publish official top speed figures for most models, so this ranking uses GPS-instrumented independent tests from MotoStatz where available, Wikipedia (citing Motorcycle Consumer News and Cycle World published data), and manufacturer figures. GPS-verified numbers win over speedometer-indicated results, which typically run 5-10% high.
The RC 8C is track-only and listed separately at the top because it’s still the fastest KTM on a straight.
Fastest KTM Motorcycles: Quick Reference
| Rank | Model | Top Speed | Power | Type |
|---|---|---|---|---|
| 1 | RC 8C (2024) | ~187 mph (est.) | 135 hp | Track only |
| 2 | 1390 Super Duke R (2024) | ~180 mph | 187 hp | Naked |
| 3 | 1290 Super Duke R | 170 mph | 177 hp | Naked |
| 4 | 990 RC R (2026) | ~168 mph (est.) | 128 hp | Supersport |
| 5 | 890 Duke R | 152 mph | 119 hp | Naked |
| 6 | 790 Duke | 144.5 mph | 105 hp | Naked |
| 7 | 990 Duke (2024) | ~137 mph (est.) | 123 hp | Naked |
| 8 | 690 Duke | ~116 mph | 73 hp | Naked |
| 9 | RC 390 | ~109 mph (est.) | 44 hp | Sport |
| 10 | 390 Duke | 106.3 mph | 44 hp | Naked |
1. KTM RC 8C (2024) – ~187 mph
The RC 8C is a track-only racing prototype limited to 100 units at $41,499. It runs an 889cc LC8c parallel-twin tuned to 135 hp with the rev limiter raised to 12,000 rpm, wrapped around a 25CrMo4 steel tubular frame with WP Apex Pro race suspension and Brembo Stylema brakes on Dymag forged aluminum wheels (Cycle World, 2024). One source lists top speed at 301 km/h (~187 mph), though this isn’t GPS-confirmed. What is documented: a Motorcycle.com tester aboard the 187 hp 1390 Super Duke R couldn’t reel it in on Portimão’s front straight — the faired track bike’s aerodynamic edge more than offset the 52 hp power deficit (Motorcycle.com, 2024).
Engine: 889cc LC8c | Power: 135 hp | Status: Track only
2. KTM 1390 Super Duke R EVO (2024) – ~180 mph
The 1390 Super Duke R is the fastest street-legal KTM in the US. Its 1,350cc V-twin produces 187 hp and 106 lb-ft of torque through KTM’s first variable valve timing system, called Cam Shift (Cycle News, 2024). KTM cites a 165 mph top speed claim; rider reports from Portimão place real-world speed closer to 180 mph, consistent with the 1290’s confirmed 170 mph figure plus the 1390’s additional 10 hp advantage. The aerodynamics are still the ceiling — at 150+ mph the naked riding position costs heavily. US MSRP is $22,999 for the EVO with semi-active WP suspension.
Engine: 1,350cc LC8 V-twin | Power: 187 hp | 0-60 mph: ~2.7 sec (est.) | MSRP: $22,999
3. KTM 1290 Super Duke R – 170 mph
MotoStatz GPS testing records a genuine 170 mph top speed for the 1290 Super Duke R (MotoStatz, 2024). The 0-60 time is 2.75 seconds, 0-100 mph takes 5.36 seconds, and the quarter mile is 10.21 seconds at 144.8 mph — territory normally reserved for 1,000cc superbikes. The 1,301cc 75-degree V-twin makes 177 hp and 106 lb-ft of torque. The wheelie tendency costs time at the drag strip; keep the front down and it’s quicker than most bikes wearing full bodywork.
Engine: 1,301cc LC8 V-twin | Power: 177 hp | 0-60 mph: 2.75 sec | Quarter mile: 10.21 sec @ 144.8 mph (MotoStatz, 2024)
4. KTM 990 RC R (2026) – ~168 mph (estimated)
The 990 RC R is KTM’s first proper street-legal sportbike since the RC8 R was discontinued in 2015. The 947cc LC8c parallel-twin produces 128 hp at 9,500 rpm, mapped specifically for the RC R with throttle bodies opening to 100% — compared to the 990 Duke’s 75% cap (Motorcycle.com, 2025). No GPS-verified top speed exists from an independent US test at the time of writing. An estimate of ~168 mph (270 km/h) is plausible given the full fairing and MotoGP-inspired winglets, but it remains unconfirmed. US MSRP is $13,999.
Engine: 947cc LC8c parallel-twin | Power: 128 hp | Top speed: ~168 mph (unconfirmed) | MSRP: $13,999
5. KTM 890 Duke R – 152 mph
MotoStatz GPS testing gives the 890 Duke R a genuine top speed of 152 mph (MotoStatz, 2022). The 889cc LC8c engine makes 119 hp. The 0-60 time is around 3.1 seconds with a clean launch, and the quarter mile takes approximately 11 seconds at 128 mph. The 152 mph figure requires a full tuck on a bike with no screen — it’s there, but you’ll feel every one of those mph in your chest. The 890 Duke R came with fully adjustable WP Apex suspension and Brembo M50 brakes.
Engine: 889cc LC8c | Power: 119 hp | 0-60 mph: ~3.1 sec | Top Speed: 152 mph (MotoStatz, 2022)
6. KTM 790 Duke – 144.5 mph
The 790 Duke appears above the 990 Duke because MotoStatz GPS records show 144.5 mph for the 790 (MotoStatz, 2022), while the heavier 990 Duke’s best published figure is approximately 137 mph. The 799cc parallel-twin makes 105 hp, and the 790 is 10-20 kg lighter than the 990 — at these speeds, weight and aerodynamics matter more than a two-horsepower paper difference. The quarter mile goes in 11.01 seconds at 124 mph, and 0-60 is 3.07 seconds.
Engine: 799cc parallel-twin | Power: 105 hp | 0-60 mph: 3.07 sec | Top Speed: 144.5 mph (MotoStatz, 2022)
7. KTM 990 Duke (2024) – ~137 mph
The 990 Duke replaced the 890 Duke R with a 947cc version of the LC8c making 123 hp and 76 lb-ft of torque, with 96% of the bike redesigned (Rider Magazine, 2024). The midrange delivery between 3,000 and 7,000 rpm is notably smoother than the 890’s more aggressive tune. Top speed is listed above 220 km/h (136.7 mph) by motoplanete.us, consistent with the class and the 990’s slight weight disadvantage over the 790. No GPS-verified US test result was available at time of writing.
Engine: 947cc LC8c | Power: 123 hp | Top Speed: ~137 mph (est.) | MSRP: $12,500
8. KTM 690 Duke – ~116 mph
The 693cc single-cylinder LC4 engine makes 73 hp. Wikipedia cites tested top speed of 183.5-188.1 km/h (114-117 mph) for the 690 Duke generation (Wikipedia, KTM 690 series). It’s fast enough to cruise highways with headroom, but the single-cylinder format runs out of breath well before the parallel-twin models. The 690 Duke R variant added WP suspension and a Brembo caliper without moving the top speed meaningfully.
Engine: 693cc single | Power: 73 hp | Top Speed: ~116 mph (Wikipedia)
9. KTM RC 390 – ~109 mph
The RC 390 shares the same 399cc single-cylinder engine and 44 hp as the 390 Duke, but the full fairing adds a few mph at the top end. Wikipedia lists the 390 Duke at 171 km/h (106 mph), and the RC 390’s faired bodywork should net a 3-5 mph advantage based on the aerodynamic difference between naked and faired ergonomics at that speed. No independent GPS test of the RC 390 was available at time of writing; treat this as an estimate.
Engine: 399cc single | Power: 44 hp | Top Speed: ~109 mph (estimated)
10. KTM 390 Duke – 106.3 mph
MotoStatz instrumented testing gives the 390 Duke a top speed of 106.3 mph (MotoStatz, 2026). The 399cc LC4c single-cylinder makes 44 hp. KTM doesn’t publish a top speed; the figure aligns with Motorcycle Consumer News testing of an earlier generation at 177 km/h (110 mph). You’ll hit the wall aerodynamically around 95-100 mph in the real world — sitting upright on a single-cylinder naked bike at triple digits feels like fighting the wind with your entire body. The 0-60 time is 4.19 seconds with an aggressive launch.
Engine: 399cc single | Power: 44 hp | 0-60 mph: 4.19 sec | Top Speed: 106.3 mph (MotoStatz, 2026)
Frequently Asked Questions About the Fastest KTM Motorcycles
What is the fastest street-legal KTM?
The 2024 KTM 1390 Super Duke R EVO is the fastest street-legal KTM sold in the US. It makes 187 hp from a 1,350cc V-twin and reportedly reaches close to 180 mph in optimal conditions. KTM’s official claim is 165 mph, and the bike is priced at $22,999 in EVO trim.
Does KTM publish official top speed figures?
No, KTM doesn’t publish top speed figures for most models. The 165 mph figure for the 1390 Super Duke R comes from KTM’s UK dealer network (DMC Motorcycles, 2024), not an official KTM press release. Independent GPS-instrumented results from MotoStatz are the best available data for most of the lineup.
Why are naked KTMs slower than their horsepower suggests?
Aerodynamic drag grows with the square of speed. At 150+ mph, a rider in an upright position against no fairing is dealing with massive air resistance. The Motorcycle.com tester on the 187 hp 1390 Super Duke R couldn’t pull in the 135 hp RC 8C on the Portimão front straight because the faired track bike cuts through air so much more efficiently (Motorcycle.com, 2024).
Is the KTM RC 8C street legal?
No. The 2024 RC 8C is a track-only prototype with no headlights, indicators, or mirrors. KTM limited production to 100 units, handbuilt by Krämer Motorcycles in Germany at $41,499 each.
How accurate are these top speed figures?
Reliability varies by source. MotoStatz figures use GPS instrumentation on closed courses and are the most trustworthy. Wikipedia cites Motorcycle Consumer News and Cycle World tested data, which is reliable. Estimates marked “(est.)” are either based on manufacturer claims without independent confirmation, or extrapolated from the closest available tested model. Speedometer-indicated figures from forum reports are not used here.
Sources: KTM US (2024); MotoStatz (2022, 2024, 2026); Cycle World (2024); Cycle News (2024, 2025); Motorcycle.com (2024, 2025); Rider Magazine (2024); Ultimate Motorcycling (2026); DMC Motorcycles Birmingham (2024); Wikipedia — KTM 1290 Super Duke R, KTM 390 series, KTM 690 series, KTM 790 Duke.
