2025 KTM 390 Duke Specs & Review

KTM’s pint-size streetfighter remains a benchmark for lively performance and everyday usability. The 2025 KTM 390 Duke carries serious hardware in a lightweight package that’s ideal for city lanes, twisty backroads, and new riders who want real capability. This KTM 390 Duke review distills the official 2025 KTM 390 Duke specs to help you decide if it fits your garage.

Key Specs at a Glance

• Displacement: 398.7 cm³
• Power: 45 PS (≈44.3 hp)
• Torque: 39 Nm (28.8 lb-ft)
• KTM 390 Duke weight: 165 kg (364 lb) fully fueled
• KTM 390 Duke seat height: 820/800 mm (adjustable)
• Engine type: 1-cylinder, 4-stroke, liquid-cooled

Engine & Performance

The heart of the 390 Duke is a 1-cylinder, 4-stroke, liquid-cooled engine displacing 398.7 cm³. With a bore x stroke of 89 x 64 mm and a 12.6:1 compression ratio, it delivers crisp response and eager revs. Output is a claimed 45 PS (≈44.3 hp) and 39 Nm (28.8 lb-ft), which translates to snappy launches, quick darts through city gaps, and enough shove to make canyon runs genuinely fun.

Bosch EMS with RBW (ride-by-wire) keeps throttle delivery precise, while a 6-speed transmission lets you keep the single in its sweet spot. The Street, Rain, and Track ride modes tailor the response to conditions, and Launch Control is available with Track Mode for consistent starts. Pair that with the tidy 520 X-Ring chain and you’ve got a drivetrain that balances durability and performance. For those who care about impact, CO2 emissions are rated at 79 g/km.

Handling, Comfort & KTM 390 Duke Seat Height

Chassis agility is a 390 Duke signature, supported here by a 1357 mm wheelbase that keeps transitions quick without feeling twitchy. The WP APEX suspension brings real adjustability: a USD 43 mm fork with compression and rebound adjusters up front, and a WP APEX monoshock with preload and rebound adjustability at the rear. With 150 mm of suspension travel at both ends, it has enough stroke to soak up rough urban pavement and stay planted on imperfect backroads.

The KTM 390 Duke seat height is adjustable to 820/800 mm, helping more riders find a confident stance. Shorter riders can drop to 800 mm for easier foot-down moments, while taller riders can use the 820 mm setting to open legroom. The listed KTM 390 Duke weight of 165 kg (364 lb) fully fueled contributes to light steering and low-speed composure—great for tight U-turns, filtering, and parking-lot drills. Tire sizes of 110/70-17 front and 150/60-17 rear offer a broad selection of grippy street rubber.

Equipment & Features

Hardware and electronics exceed expectations for the class. Braking is handled by a four-piston radial fixed caliper biting a 320 mm front disc, with a 240 mm rear disc out back—solid feel and confidence when you’re pushing or scrubbing speed in traffic. The bike rides on a steel trellis frame, powder coated for durability, and feeds you info through a sharp 5-inch TFT display.

Electronics include Bosch EMS with RBW, three ride modes (Street, Rain, Track), and Launch Control with Track Mode. Practical touches include a 15 L (3.96 US gal) fuel tank for respectable range, an 8 Ah battery, and a durable 520 X-Ring chain. Details enthusiasts appreciate—like WP APEX adjustability and 150 mm suspension travel front and rear—add tuning latitude for mixed riding. Styling-wise, you can choose from Electronic Orange or Atlantic Blue.

Who Is the 2025 KTM 390 Duke For?

New riders will appreciate the approachable power, the adjustable KTM 390 Duke seat height (820/800 mm), and the manageable fully fueled weight of 165 kg (364 lb). Commuters will value the upright ergonomics, the 5-inch TFT display, and Rain mode for slick days. Experienced riders looking for a playful backroad or track tool will like the WP APEX adjustability, the responsive single, and Track Mode with Launch Control. If you want a nimble naked that’s easy to live with but still rewarding to push, it’s right on target.

Torquepedia Verdict

The 2025 KTM 390 Duke blends real performance with usability: a lively 398.7 cm³ single making 45 PS (≈44.3 hp) and 39 Nm (28.8 lb-ft), proper brakes, and suspension you can actually adjust. It’s nimble, welcoming, and well-equipped for its category, from the 5-inch TFT and ride modes to the stout steel trellis frame.

Weaknesses are typical of lightweight singles—best enjoyed in the city and on twisties rather than long, high-speed slogs—but that’s part of the charm. If your riding skews toward commuting, urban play, or carving technical roads, the 2025 KTM 390 Duke specs make a compelling case in the lightweight naked class.

FAQ

• Is the 2025 KTM 390 Duke good for beginners? Yes. It offers approachable performance (45 PS ≈44.3 hp), a manageable fully fueled weight of 165 kg (364 lb), adjustable seat height (820/800 mm), and Rain mode for gentler throttle response.

• What is the seat height of the 2025 KTM 390 Duke? The KTM 390 Duke seat height is adjustable to 820/800 mm.

• How heavy is the 2025 KTM 390 Duke? The KTM 390 Duke weight is 165 kg (364 lb) fully fueled.

• What electronics and ride modes does it have? It features Bosch EMS with RBW, three ride modes (Street, Rain, Track), and Launch Control with Track Mode. The bike also uses a 5-inch TFT display.

• What are the tire sizes on the 2025 KTM 390 Duke? It runs 110/70-17 up front and 150/60-17 at the rear.