BamX BX70-DB Trailstar - 2011 Specifications and Reviews

The 2011 BamX BX70-DB Trailstar is a lightweight minibike designed for young riders and beginners seeking off-road adventure. Its compact 72cc four-stroke engine delivers modest power suitable for learning basic trail skills on varied terrain. Known for affordability and manageability, this air-cooled commuter excels in developing rider confidence on unpaved surfaces.

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General information

CategoryMinibike, cross
Year2011
ModelBamX BX70-DB Trailstar

Engine and Transmission Specifications

Transmission type,final driveChain
GearboxAutomatic
Cooling systemAir
Lubrication systemPressure/Splash
IgnitionC.D.I.
Fuel controlOHC
Fuel systemCarburettor
Bore x stroke47.0 x 41.4 mm (1.9 x 1.6 inches)
Compression8.8:1
Torque4.20 Nm (0.4 kgf-m or 3.1 ft.lbs) @ 5500
Power3.60
Engine detailsHorizontal Single Cylinder
Engine typeSingle cylinder, four-stroke
Capacity:72.00 ccm (4.39 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesSingle disc
Front brakesSingle disc
Rear tyre dimensions2.75-14
Front tyre dimensions2.50-12
Rear suspensionSwing Arm Mono Shock
Front suspensionDual Front Shocks
 
 

Physical measures and capacities

Oil capacity0.90 litres (0.06 quarts)
Fuel capacity4.00 litres (1.06 gallons)
Ground clearance254 mm (10.0 inches)
Seat height711 mm (28.0 inches) If adjustable, lowest setting.
Power/weight ratio0.0721 HP/kg
Dry weight49.9 kg (110.0 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsRed, blue
StarterElectric

Performance Profile & Rider Fit

3.6 hp
Peak Power

Best For

Track15%
City20%
Cornering55%
Daily Riding10%
Touring5%
Passenger0%

Rider Profile

Best ForThis minibike is best suited to young or beginner riders who are just learning throttle and balance control.
PurposeIt's designed for casual, low-speed cross/off-road fun in a backyard, trail, or small track setting rather than any serious performance riding.
Rider FitIts tiny frame, low seat height, and light weight make it accessible to smaller or younger riders rather than full-sized adults.
CharacterA playful, lightweight pit-bike with an automatic gearbox that prioritizes simplicity and fun over speed or power.
Not Ideal ForIt is not suitable for adult commuting, highway travel, passengers, or anyone seeking real off-road or touring capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Reviews

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