Rev it up and ride fearless. Onslaught™ rides smooth and delivers more power than you'll ever need.

Tackle trails – and to-do lists. Our Onslaught™ 550 ATV gives you plenty of power, and an EFI engine that knows how to make the most of it.


  • POWER: Onslaught brings more than enough power with a liquid-cooled 503cc engine featuring electronic fuel injection.
  • SUSPENSION AND HANDLING: Electronic Power Steering and four-wheel double A-arm suspension give you total command and comfort.
  • RELIABILITY: Onslaught is backed with an unsurpassed 1 year warranty.

Suspension and Handling

  • FOUR-WHEEL DOUBLE A-ARM SUSPENSION: Onslaught makes every ride a smooth one with its precision-tuned, four-wheel, double A-Arm suspension. From springs to shocks, our suspension system effortlessly conquers challenging terrain.
  • ELECTRONIC POWER STEERING (EPS): The power doesn't have to stop at the engine. Take command with an Onslaught EPS model and get the easiest, most responsive steering available.
  • BEST-IN-CLASS 12 IN. GROUND CLEARANCE: Onslaught clears obstacles before they ever become a problem, with more ground clearance than anything else in its class.

General Information

Manufacturer Bad Boy Off Road
Model Year 2017
Model Onslaught 550
Model Code 646891
Color Olive Green



Brake system - Hydraulic disc (200 mm, 180 mm)

Rear foot brake

Parking brake - Lockable hand lever


Front - AT25 x 8-12

Rear - AT25 x 10-12

Wheels Steel


Length Overall - 84.8 in. (2,155 mm)
Height Overall - 49.2 in. (1,250 mm)
Width Overall - 48.6 in. (1,235 mm)
Weight Wet - 803 lb. (364 kg)
Ground Clearance 12 in. (30 cm)
Wheelbase 50.4 in. (1,280 mm)
Seat Height 36.1 in. (914 mm)



Drive Train - CVT

Gear Selection - L/H/N/R

Differentials - Manual locking

Drive System 4x4


Instrumentation Digital instrument panel with odometer, speedometer, tripmeter, rpm, transmission position, fuel gauge, hi-temp / low-batt lights, high beam light, EFI checking, differential indicator, 2WD/4WD indicator, 12V DC outlet
Battery 12V, 18Ah


Engine 4-stroke, SOHC, single-cylinder, gas
Horsepower 39 hp
Displacement 503 cc
Fuel Capacity 4.2 gal. (16 l)
Starting Electric
Cooling Liquid
Fuel System Electronic Fuel Injection (EFI)


Steering Standard

Front - Double A-arm; Travel - 8.7 in. (22 cm)

Rear - Double A-arm, IRS; Travel - 9.4 in. (24 cm)

Load Capacity

Front - 675 lb. (306 kg)

Rear - 679 lb. (308 kg)

Front rack (with max loading) - 99 lb. (45 kg)

Rear rack (with max loading) - 165 lb. (75 kg)

Frame Structurally welded high strength steel


Additional Colors Black
Lighting Dual 60W low / high beam lights, third-head light, dual brake lights, taillights
Warranty 1 Year

2017 Bad Boy Off Road Onslaught 550