Engineered by BamX for the atv motorcycle segment, the 2010 BamX BX250-S1 Assault relies on a 230 cc (14 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 11.5 HP (8.4 kW) while maximum torque reaches 18 Nm (13.3 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 50 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 BX250-S1 Assault measures 395 kg (871 lbs) dry, translating to a power-to-weight ratio of 0.03 HP/kg (34.35 kg per horsepower). Rider ergonomics and chassis geometry center around a 762 mm (30 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,168 mm (46 in) wheelbase engineered for quick, flickable steering geometry. The 6.5-liter (1.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
50 HP/L
Power-to-Weight
0.03 HP/kg (34.35 kg/HP)
Standover Height
762 mm (30 in)
Engine
Displacement230.0 ccm (14.03 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power11.5 HP (8.4 kW))
Torque18.0 Nm (1.8 kgf-m or 13.3 ft.lbs) @ 5500 RPM
Compression9.2:1
Bore x Stroke67.0 x 65.0 mm (2.6 x 2.6 inches)
Fuel SystemCarburettor
IgnitionCDI
CoolingAir
Transmission
Gearbox4-speed
Final DriveChain (final drive)
Chassis
Front SuspensionDouble A-Arm
Rear SuspensionSwing Arm
Wheelbase1168 mm (46.0 inches)
Ground Clearance152 mm (6.0 inches)
Wheels & Brakes
Front Tyre21/7-10
Rear Tyre20/10-9
Front BrakesSingle disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight395.0 kg (870.8 pounds)
Power/Weight0.0291 HP/kg
Seat Height762 mm (30.0 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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
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.
