Built around BamX's atv motorcycle platform, the 2010 BamX BX400-S Assault relies on a 387 cc (23.6 cu in) oil & air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 19 HP (13.9 kW) while maximum torque reaches 25 Nm (18.4 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 49.1 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the BX400-S Assault measures 193.2 kg (426 lbs) dry, translating to a power-to-weight ratio of 0.1 HP/kg (10.17 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,219 mm (48 in) wheelbase engineered for quick, flickable steering geometry. The 9-liter (2.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
49.1 HP/L
Power-to-Weight
0.1 HP/kg (10.17 kg/HP)
Engine
Displacement387.0 ccm (23.61 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power19.0 HP (13.9 kW))
Torque25.0 Nm (2.5 kgf-m or 18.4 ft.lbs) @ 5500 RPM
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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
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.
