At the heart of the 2023 Swm Hoku 400 naked motorcycle, Swm relies on a 378 cc (23.1 cu in) liquid-cooled twin, four-stroke powerplant. In factory specification, peak output is rated at 44.3 HP (32.3 kW), transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 117.2 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the Hoku 400 measures 154 kg (340 lbs) dry, translating to a power-to-weight ratio of 0.29 HP/kg (3.48 kg per horsepower). Rider ergonomics and chassis geometry center around a 820 mm (32.3 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams. The 16.5-liter (4.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Swm archive, this model family spans 3 indexed model years from 2023 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
117.2 HP/L
Power-to-Weight
0.29 HP/kg (3.48 kg/HP)
Standover Height
820 mm (32.3 in)
Engine
Displacement378.0 ccm (23.07 cubic inches)
Engine TypeTwin, four-stroke
Power44.3 HP (32.3 kW))
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionElectronic
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet, multiplate type
Performance
Emission DetailsEuro 5
Chassis
Front SuspensionKayba telescopic hydraulic fork
Rear SuspensionMonoshock
Wheels & Brakes
Front Tyre110/70-17
Rear Tyre150/60-17
Front BrakesSingle disc. ABS. Brembo
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc. ABS. Brembo.
Rear Brake Ø220 mm (8.7 inches)
WheelsWire spoked. Michelin tyres.
Dimensions & Weight
Dry Weight154.0 kg (339.5 pounds)
Power/Weight0.2873 HP/kg
Seat Height820 mm (32.3 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
