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Brute Force™ 650 4x4i
A blend of comfort, ability and ruggedness make this ATV a winner

Brute Force 650 4x4iWhether you are heading out into the great wide open for work or for pleasure, Kawasaki’s Brute Force™ 650 4x4i ATV is the perfect companion. This sport-utility all-terrain vehicle boasts a 633cc V-twin engine, with plentiful torque and a user-friendly power delivery. Independent front and rear suspension coupled with four-wheel-drive and an upright seating position creates a comfortable go anywhere ride in an affordable package.

This ATV will shine under the most grueling circumstances in both low-to-mid range rpm and high rpm ranges. The 90-degree, liquid-cooled four-stroke powerplant will be there to answer any needs posed by its target audience of adventure enthusiasts and sportsmen.

The engine features a bore and stroke of 80mm x 63mm, linerless aluminum cylinders based on its big brother’s, and a lightweight crankshaft.

Helping to lighten the load, engineers have used aluminum to replace steel in the construction of the front exhaust pipe cover, new two-piece center exhaust pipe cover, and the muffler cover. Transmission gears in the Brute Force 650 4x4i feature holes to lighten the overall weight and several other minor changes have been introduced to optimize the power-to-weight ratio.

ts chassis has a revised caster angle for the front A-arms—upper and lower—resulting in light and responsive steering as well as excellent ground-following abilities. Shock absorber spring rates and initial preload settings for both front and rear have been revised to improve ride comfort. Riding comfort was also considered when this unit was slated for a seat using a softer urethane foam cushion.

The Brute Force 650 4x4i transfers power from its V-twin engine to the wheels through a dual range continuously variable transmission (CVT) featuring high, low, and reverse. The rider can select two- or four-wheel drive by simply pressing a handlebar-mounted button.

Stopping the 650 4x4i are dual 200mm front discs and an enclosed wet multi-plate rear brake system. Its towing capacity is a hefty 1,250 pounds, and it will carry a combined 264 pounds on its front and rear racks.

Brute Force 650 4x4It may be the slightly smaller one in Kawasaki’s stable of IRS-equipped ATVs, but it doesn’t sacrifice anything in the “looks” department. Designers gave the Brute Force 650 4x4i a rugged, take-on-anything type of appearance with a front guard design that will both attract onlookers and satisfy owners. It will come cloaked in either Woodsman Green, Aztec Red, or Realtree Hardwoods Green® HD™ camouflage.

Authentic Kawasaki Accessories for the 2006 Brute Force 650 4x4i are available through Kawasaki dealers or the can be purchased on the Internet at

As with all off-highway vehicle recreation, Kawasaki encourages ATV riders to ride responsibly and to respect the environment. Kawasaki will pay first-time buyers of a new Kawasaki ATV $100 for completing an ATV rider safety course conducted by the ATV Safety Institute (ASI). Interested consumers can call ASI, toll-free, at 800-887-2887.


Unique features:

  • Perfectly-Balanced V-Twin Engine
  • KAPS Automatic Transmission
  • Kawasaki Engine Break Control
  • Exclusive Variable Limited-Slip Front Differential
  • Sealed Rear Brake System


  • 633cc four-stroke, liquid-cooled V-twin
  • All-aluminum cylinders with Electrofusion coating are durable and help the engine produce more power. The aluminum bores eliminate cast iron cylinders liners to improve heat dispersion and reduce weight.
  • V-twin design and oversquare bore and stroke help produce high torque with a broad, user-friendly curve
  • 90-degree cylinder offset produces perfect primary balance to minimize vibration for rider comfort

4-Valve Cylinder Head

  • Intake ports designed to provide a straight fuel path from the carburetors for improved efficiency and more power
  • 4 valves provide maximum valve area for optimal flow
  • Boosts low-end torque

Twin Downdraft Carburetors

  • Twin CVKR-34 carburetors are 2mm larger than the Brute Force 650 4x4 and are mounted in a downdraft position, providing the fuel mixture with a straight shot into the combustion chamber

Liquid Cooling

  • Brute Force 650 4x4Larger-capacity radiator provides consistent cooling, allowing closer engine tolerances, quieter running, and ultimate durability
  • Thermostatically-controlled fan keeps engine cool even at very low vehicle speeds

Snorkel Air Intake

  • Airbox design provides easy access to simplify maintenance
  • Oval-type air filter provides large intake area and reduces dust build-up on the filter

Kawasaki Automatic Power-Drive System

  • The drive converter shaft is hard chrome finished for durability
  • Shifting timed in higher rpm range for snappy throttle response and class leading acceleration
  • Strong CVT belt handles the increased power
  • Water drain hole in drive pulley cover prevents mud from clogging release bearing for added durability
  • Belt Check indicator lamp is easy to see
  • Continuously variable transmission is fully automatic

Kawasaki Engine Break Control

  • Engine brake actuator controller maintains proper adjustment during servicing and maintains reliability of engine brake activation
  • Automatically applied under certain conditions to provide engine braking for additional slowing power when descending hills
  • Exclusive Kawasaki design adds no additional weight to drive converter for faster engine spooling and throttle response
  • Automatically compensates for CVT belt wear to maintain consistent engagement

Exclusive Variable Limited-Slip Front Differential

  • Allows riders to control the amount of slip in the limited-slip front differential

Electrically “Selectable” 2WD/4WD

  • Choose between 2WD and 4WD for changing terrain and applications with the flip of a switch

Independent Front Suspension

  • Double wishbone and coil-over-shock absorbers with adjustable preload provide a comfortable ride with 6.7 inches of suspension travel
  • Revised caster angle for the A-arms provides lighter steering
  • Aluminum steering knuckles are tough and feature added protection for the CV boots
  • Constant velocity joints at the front wheels have a wide operating range for durability. The joints can also be independently disassembled to simplify maintenance.

Independent Rear Suspension

  • Double wishbone and preload adjustable shock for each rear wheel provides superior ride comfort and ground following ability
  • Torsion bar helps control body roll

Sealed Rear Brake System

  • Multi-disk rear brake system is totally enclosed within the frame-mounted rear gear case
  • Operates in a sealed oil bath so that the brake is unaffected by water, mud, dust and debris
  • Compact design provides more ground clearance at the rear end

Rugged Bodywork

  • Thermoplastic olefin bodywork has a high gloss finish for great looks and is more scratch resistant than polyethylene plastic so it stays looking good longer
  • Dual compartments on the front fenders provide convenient storage. Optional storage cylinder at the rear matches the muffler shape for a sporty, balanced appearance.

Spacious Cockpit

  • Comfortable, upright seating position combines with the independent rear suspension for a luxurious ride
  • Wide seat for increased rider comfort

Additional features

  • Trailer hitch bracket with 1,250 lbs. towing capacity is standard equipment
  • Digital speedometer, odometer, twin trip meters, clock, hour meter and fuelgage are mounted at a steep angle and has a visor to make the meter more visible from the upright seating position
  • Tire and wheel design provides an integrated look with aggressive bodywork as well as superb traction


  • Brute Force 650 4x4iEngine: Four-stroke, V-twin, liquid-cooled, SOHC, four-valve
  • Displacement: 633 cm
  • Bore x stroke: 80.0 x 63.0mm
  • Compression ratio: 9.9:1
  • Carburetor: Keihin CVKR-34 x 2
  • Transmission / drive system: KAPS, Dual Range with Reverse, 2WD/4WD, shaft
  • Tires, front: AT25 x 8-12
  • Tires, rear: AT25 x 10-12
  • Wheelbase: 50.4 in.
  • Minimum turning radius: 10.8 ft.
  • Brakes, front: Hydraulic discs
  • Brakes, rear: Sealed multi-disc
  • Suspension, front: Dual A-Arms, two shocks with five-way preload adjustment
  • Suspension, rear: Dual A-Arms, two shocks with five-way preload adjustment
  • Wheel travel, front: 6.7 in.
  • Wheel travel, rear: 7.9 in.
  • Ground clearance: 10.1 in.
  • Fuel capacity: 5.4 gal.
  • Track front/rear: 36.2 in. / 35.2 in.
  • Length x width x height: 86.4 x 46.3 x 48.4 in.
  • Overall height: 48.4 in.
  • Rack capacity, front/rear: 88 lbs. / 176 lbs.
  • Towing capacity: 1,250 lbs.
  • Tongue weight capacity: 88 lbs.
  • Dry weight: 606 lbs.
  • Color choices: Woodsman Green, Aztec Red, Black
  • MSRP: $7,099
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