KAWASAKI Z400 vs KAWASAKI Z900RS SE
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Scores, summary & seat (optional) Estimates and auto text from specs — open if you want them.
Technical score (estimate)
Weighted mix of power, torque, power-to-weight, top speed and lighter weight within this comparison only. Not a real-world verdict — riding style and roads matter.
Usage fit (estimate)
Rough scores for city riding, touring, sporty riding and new riders — mix of specs and bike category. Same caveats as the technical score: traffic, skill and tyres matter.
City / commute
Touring / long rides
Sporty riding
New rider friendly
Seat height (cm)
Figures are as in the database; boots, suspension sag and road surface change how tall the bike feels.
- KAWASAKI Z400 78.5 cm Lowest seat here
- KAWASAKI Z900RS SE 84.5 cm Tallest seat here
Spread in this comparison: about 6 cm.
Rough guide: comfortable flat-foot reach often needs inseam roughly in the same ballpark as seat height (varies a lot by ergonomics).
Auto summary from specs
Generated from the numbers in the comparison — not a review.
- Power spans 45 hp (KAWASAKI Z400) up to 111 hp (KAWASAKI Z900RS SE).
- Torque spans 37.2 Nm (KAWASAKI Z400) up to 98.5 Nm (KAWASAKI Z900RS SE).
- Weight spans 167 kg (KAWASAKI Z400) to 215 kg (KAWASAKI Z900RS SE).
- Displacement spans 400 cc (KAWASAKI Z400) to 900 cc (KAWASAKI Z900RS SE).
Reader votes so far — total 1: KAWASAKI Z400 (0); KAWASAKI Z900RS SE (1).
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| Specification | KAWASAKI Z400 | KAWASAKI Z900RS SE |
|---|---|---|
| Brand | KAWASAKI | KAWASAKI |
| Model | KAWASAKI Z400 | KAWASAKI Z900RS SE |
| Engine size | 400cc | 900cc |
| Power | 45hp | 111hp |
| Torque | 37.2nm. | 98.5nm. |
| Cylinders / valves | Twin cylinder, 8 valves | 4 cylinders, 16 valves |
| Weight | 167kg | 215kg |
| Front brake | 310 mm petal discs. Single balanced actuation, dual-piston caliper | Twin semi-floating 300 mm discs. Caliper: Twin Brembo M4 radial mounted, monoblock, opposed 4-piston |
| Rear brake | 220 mm single petal disc. Dual-piston caliper | 250 mm single disc. Caliper: Single-piston |
| Seat height (cm) | 78.5cm | 84.5cm |
| Front tyre | 110/70R17 M/C 54H | 120/70ZR17M/C (58W) |
| Rear tyre | 150/60R17 M/C 66H | 180/55ZR17M/C (73W) |
| Cooling | Liquid cooling | Liquid cooling |
| Front suspension | 41mm telescopic fork | 41 mm inverted fork, compression and rebound damping, and adjustable spring preload |
| Rear suspension | Bottom-Link Uni-Trak, gas-charged, preload adjustable | Horizontal Back-link, rebound damping, and adjustable spring preload gas-charged shock |
| Motorcycle type | Naked | Naked |
| Top speed | 185km/h | 240km/h |
| Fuel capacity / consumption | 14 L – 3.5 L/100km | 17 L – 7 L/100km |
| Service network | ||
| Service quality | ||
| Parts availability | ||
| Price | $5399 | $12349 |
| Brand price lists | View KAWASAKI price list | View KAWASAKI price list |
| Extra features | -New Slipper Clutch -Economical Riding Indicator |
-Slipper Clutch -KTRC (Kawasaki Traction Control) -Dual Throttle Valves |
Opinions
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2023 KAWASAKI Z400 vs 2023 KAWASAKI Z900RS SE: listed specifications
The 2023 KAWASAKI Z400 and 2023 KAWASAKI Z900RS SE differ on the listed specifications: the Z400 has a lower listed weight, and the Z900RS SE has more displacement, peak power and torque, and the higher listed top speed.
Engine displacement
Z900RS SE has a clearly larger listed engine displacement (900 cc vs 400 cc).
Peak power
Z900RS SE has a clear listed power advantage (111 hp vs 45 hp).
Torque
Z900RS SE has a clear listed torque advantage (98.5 Nm vs 37.2 Nm).
Listed top speed
Z900RS SE has a clear listed top-speed advantage (240 km/h vs 185 km/h).
Cooling
Both motorcycles are listed as liquid-cooled.
Weight and seat height
Z400 is notably lighter on the listed weight (167 kg vs 215 kg). There is a noticeable listed seat-height difference: Z900RS SE is listed higher (84.5 cm) than Z400 (78.5 cm).
Conclusion
The measurable differences are therefore concentrated in displacement, peak power, torque, listed top speed, weight and seat height.
Frequently asked questions
What is the top speed of KAWASAKI Z400 vs KAWASAKI Z900RS SE?
KAWASAKI Z900RS SE is listed at 240 km/h (149 mph) vs 185 km/h (115 mph) for KAWASAKI Z400.
Which has more horsepower, KAWASAKI Z400 or KAWASAKI Z900RS SE?
KAWASAKI Z900RS SE has 111 hp compared with 45 hp on the KAWASAKI Z400.
Which is lighter, KAWASAKI Z400 or KAWASAKI Z900RS SE?
KAWASAKI Z400 is lighter at 167 kg vs 215 kg for KAWASAKI Z900RS SE.
Which is better, KAWASAKI Z400 or KAWASAKI Z900RS SE?
It depends on your riding style. Compare top speed, weight, fuel use and price in the table on this page, then vote for the bike you prefer.
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