2026 KTM 390 Duke vs 2026 Kawasaki Z400 - Spec Comparison
Choose up to 4 bikes to compare
2026 KTM 390 Duke
The 2026 KTM 390 Duke is an agile, lightweight naked bike engineered for beginner to intermediate riders seeking thrilling urban performance and weekend adventures. Its punchy 398cc single-cylinder engine delivers 45 PS with responsive handling courtesy of the WP APEX suspension and steel trellis frame, making it an accessible gateway into spirited motorcycling.
2026 Kawasaki Z400
The 2026 Kawasaki Z400 is a lightweight naked bike for newer riders and those moving up from a 125. Its liquid-cooled 399cc parallel twin makes 45 hp and 38 Nm through a six-speed gearbox. A low 785 mm seat, 165 kg wet weight and standard ABS make it easy to manage, and the economical riding indicator helps stretch the 14-litre tank.
2026 KTM 390 Duke vs 2026 Kawasaki Z400: the key differences
Both are naked bikes, so this is a like-for-like choice.
- The 2026 Kawasaki Z400 has a 35 mm lower seat (785 vs 820 mm), which helps shorter riders.
2026 KTM 390 Duke: Built primarily as a nimble city and canyon-carving streetfighter rather than a long-distance or off-road machine.
2026 Kawasaki Z400: A lightweight middleweight naked built for commuting, city hopping and spirited weekend backroad rides, with enough legs for occasional short highway trips.
Verdict: Choose the 2026 Kawasaki Z400 if you want a lower seat. Check the full table below for every figure, and the size comparison for fit.
| Specification | 2026 KTM 390 Duke | 2026 Kawasaki Z400 |
|---|---|---|
| Other | ||
| Category | Naked | Naked |
| Color Options | - | Metallic Matte Graphenesteel Gray/Metallic Spark Black, Pearl Robotic White/Metallic Matte Graphenesteel Gray |
| Warranty | - | 12 |
| Comments | - | Economical Riding Indicator. |
| Engine | ||
| Capacity: | 398.7 ccm (24.33 cubic inches) | 399.0 ccm (24.35 cubic inches) |
| CO2 Emissions | 95 CO2 g/km | - |
| EPA Certificate No. | TKTXC.399FOI-006 | - |
| EPA Est. Fuel Consumption | 4.04 L/100km (58.2 US mpg) | - |
| EPA CO Emissions | 0.4 CO g/km | - |
| Engine Type | Single, four-stroke | Parallel Twin, four-stroke |
| Bore x Stroke | 89.0 x 60.0 mm (3.5 x 2.4 inches) | 70.0 x 51.8 mm (2.8 x 2.0 inches) |
| Cooling System | Liquid | Liquid |
| Fuel System | Injection | Injection |
| Starting | Electric | Electric |
| Aspiration | Naturally aspirated | - |
| Valves Per Cylinder | 4 | 4 |
| Compression | - | 11.5:1 |
| Ignition | - | TCBI with digital advance |
| Performance | ||
| Power | ✓44.4 HP (33.0 kW) @ 8500 RPM | 45.0 HP (32.8 kW) @ 10000 RPM |
| Torque | ✓39.0 Nm (4.0 kgf-m or 28.8 ft.lbs) | 38.0 Nm (3.9 kgf-m or 28.0 ft.lbs) @ 8000 RPM |
| Power/Weight Ratio | 0.2980 HP/kg (dry) | 0.2727 HP/kg (wet) |
| Chassis & suspension | ||
| Frame | Steel trellis frame, powder coated | Trellis, high-tensile steel |
| Front Suspension | WP APEX 43 | Telescopic fork |
| Rear Suspension | WP Suspension | Uni-Trak® swingarm |
| Front Wheel Travel | 150 mm (5.9 inches) | 119 mm (4.7 inches) |
| Rear Wheel Travel | 150 mm (5.9 inches) | 130 mm (5.1 inches) |
| Rake (fork angle) | - | 24.5° |
| Trail | - | 91 mm (3.6 inches) |
| Ground Clearance | - | 145 mm (5.7 inches) |
| Transmission | ||
| Gearbox | 6-speed | 6-speed |
| Transmission Type | Manual | Manual |
| Final Drive | Chain | Chain |
| Clutch | Wet multi-disc clutch / mechanically operated | Assist and slipper Clutch |
| Brakes & wheels | ||
| Front Brakes | Four-piston radial fixed calliper | Single disc. ABS |
| Front Brakes Diameter | 320 mm (12.6 inches) | 310 mm (12.2 inches) |
| Rear Brakes | Single disc. Brembo. ABS. | Single disc. ABS |
| Rear Brakes Diameter | 240 mm (9.4 inches) | - |
| ABS | Yes | Yes |
| Front Tyre | - | 110/70-17M |
| Rear Tyre | - | 150/60-17M |
| Dimensions & weight | ||
| Wheelbase | 1357 mm (53.4 inches) | 1369 mm (53.9 inches) |
| Seat Height | 820 mm (32.3 inches) | ✓785 mm (30.9 inches) |
| Dry weight | 149.0 kg (328.5 pounds) | - |
| Wet Weight | ✓165.0 kg (363.8 pounds) | ✓165.0 kg (363.8 pounds) |
| Fuel Capacity | 13.40 litres (3.54 US gallons) | ✓14.00 litres (3.70 US gallons) |
| Overall Length | - | 1989 mm (78.3 inches) |
| Overall Width | - | 800 mm (31.5 inches) |
| Overall Height | - | 1054 mm (41.5 inches) |
| Oil capacity | - | 2.00 litres (2.11 US quarts) |
"Best" (✓) reflects that single spec only, not overall suitability - a bike can win on paper and still be the wrong choice for you. Ties are all marked; specs with no clear better/worse direction (e.g. displacement, wheel size) are never marked, only tinted where bikes differ.
Affiliate links - we may earn a commission from qualifying eBay purchases made through these links.
About this comparison tool
This tool puts up to four motorcycles side by side across their full specification sheets, drawn from a database of 43,000+ models and 1.60M+ individual specifications. Wherever a spec has a clear "better" direction - more power, less weight - the strongest figure in that row is highlighted automatically.
How to use it
Pick a make, model and year for each bike; the model and year lists update to match what you've selected. Two bikes are enough - use "Add another bike" for a third or fourth. Comparisons work across model years too, so you can compare a bike against its own earlier generation. Once you're happy with the lineup, use "Copy share link" to send it to someone else.
What gets compared
Specs are pulled from the same categories used throughout the site: engine and transmission (capacity, power, torque, gearbox), physical measures (weight, seat height, fuel and tank capacity), frame and dimensions, speed and acceleration, and brakes, suspension, frame and wheels (including tyres) - plus general information and maintenance data where it's on record for a bike.
How the highlighting works, and its limits
A highlighted cell means one bike has the clearly better raw number for that spec - more power, less weight, and so on. Fields where "better" genuinely depends on the rider - seat height above all - are deliberately never highlighted: a lower seat isn't automatically the right choice, it's a fit question only you can answer. Winning a row also isn't the same as winning the comparison - a bike can lead on paper in half the rows and still be the wrong bike for you.
Frequently asked questions
Can I compare bikes from different categories, like a scooter against a superbike?
Yes - the tool doesn't restrict what you compare, though a highlighted spec means less when the two bikes aren't really doing the same job.
What happens if a spec is missing for one of the bikes?
It shows as "-" and is never highlighted as a winner - a missing figure never beats one that's actually reported, and never blocks the rest of the row.
Are older model years included?
Yes - each bike's year list covers every model year in the database, so you can compare this year's bike against an earlier generation of the same model.
How do I share a comparison?
Every comparison has its own stable URL - use "Copy share link", or just copy the address bar. The same bikes in the same order always produce the same link.