BamX BX400: history, specs, pictures

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BamX BX400
Manufacturer
Also called BX400-S Assault, BX400-U4 Sierra
Production 2010 - 2012
Engine
single cylinder, four-stroke
Bore / Stroke 83.0mm x 71.6mm
Torque 18.44 ft/lbs (25.0 Nm) @ 5500RPM
Fuel System carburetor
Ignition cdi
Transmission Gear box: automatic
Final Drive: shaft drive (cardan)
Suspension Front: double a-arm
Rear: swing arm
Brakes Front: double disc
Rear: single disc
Front Tire 25/8-12
Rear Tire 25/10-12
Wheelbase 49.02 inches (1245 mm)
Seat Height 34.02 inches (864 mm)
Weight 587.09 pounds (266.3 Kg) (dry),
Oil Capacity 0.45 Gallon (1.70 Liters)
Fuel Capacity 3.57 Gallon (13.50 Liters)
Manuals Service Manual


The BamX BX400-U4 Sierra was a single cylinder, four-stroke standard produced by BamX between 2010 and 2012. Max torque was 18.44 ft/lbs (25.0 Nm) @ 5500 RPM.

Engine[edit | edit source]

The engine was a oil & air cooled single cylinder, four-stroke. A 83.0mm bore x 71.6mm stroke result in a displacement of just 387.0 cubic centimeters.

Drive[edit | edit source]

The bike has a automatic transmission.

Chassis[edit | edit source]

It came with a 25/8-12 front tire and a 25/10-12 rear tire. Stopping was achieved via double disc in the front and a single disc in the rear. The front suspension was a double a-arm while the rear was equipped with a swing arm. The BX400-U4 Sierra was fitted with a 3.57 Gallon (13.50 Liters) fuel tank. The bike weighed just 587.09 pounds (266.3 Kg). The wheelbase was 49.02 inches (1245 mm) long.