2025 KAWASAKI KLX 140R F

In 1982, Suzuki introduced the world's first four-wheel ATV. Today, Suzuki ATVs are everywhere. From the most remote areas to the most challenging tasks, you will find the KingQuad powering a rider onward. Across the board, the Suzuki KingQuad lineup is an exceptional group of ATVs.

Whether you are working hard or getting away from it all, the 2025 Suzuki KingQuad 400ASi helps you every step of the way. The fully automatic QuadmaticTM transmission has 2WD and 4WD modes to manage rough trail conditions while completing even the most demanding chores. Along with exceptional engine performance across the powerband, its high-performance iridium spark plug, and Pulsed-secondary AIR-injection (PAIR) system help provide outstanding fuel efficiency and impressive performance.

The KingQuad 400ASi is not eligible for sale in California per California Air Resource Board (CARB) off-highway vehicle regulations.

Key Features

Engine Features

The KingQuad 400ASi’s fuel-injected, 376cc, four-stroke, four-valve engine produces efficient power and drivability.

Suzuki's class-leading fuel injection smooths power output, especially in the mid-to-high range, and provides excellent cold starting. The system uses 3-D maps for optimum ignition, creating responsive yet environmentally compliant performance.

Suzuki Advanced Cooling System (SACS) uses an oil cooler and thermostat-controlled cooling fan to shed engine heat during hard work or cargo hauling.

The Engine Control Unit (ECU) has slip control logic, which adjusts fuel injector duration and timing to improve drivability and grip in loose/slippery conditions.

Transmission Features

The QuadmaticTM transmission is a fully automatic, CVT (continuously variable transmission) with selectable high/low sub-transmission and reverse for maximum traction and fuel efficiency.

Automotive gate-type gearshift lever lets you conveniently choose high or low range, neutral, or reverse.

Select 2WD and 4WD with the flip of a handlebar-mounted lever. The shaft drive system is dependable and durable and is almost maintenance-free.

Torque-sensing limited-slip front differential provides maximum traction and light steering when in 4WD mode.

Chassis Features

Independent front A-arm suspension offers smooth performance and remarkable ground clearance with 6.7 inches (170.1 mm) of wheel travel.

A swingarm rear suspension with 6.7 inches (170.1 mm) of wheel travel and twin shock absorbers provides agile handling and plush riding.

Dual front hydraulic disc brakes feature calipers with large, 34mm pistons and wide brake-pad surface area for ample stopping power and outstanding durability. Lightweight and durable plastic skid plates are sturdy to withstand trail pounding, yet slippery to let obstacles slide below.

Large, 25-inch Carlisle® tires with aggressive tread offer consistent traction in wet conditions, yet make for a quiet, smooth ride on hard-packed trails.

Electrical Features

Dual 35-watt headlights (with high- and low-beam settings) are part of the distinctive KingQuad grille appearance. A bright taillight helps make the ATV visible in dark conditions.

LCD instrumentation includes a speedometer, odometer, trip meter, hour meter, clock, fuel gauge, and indicators for reverse, neutral, oil, and FI (fuel injection).

Automotive-style DC power outlet is included on the front fender.

Winch-ready mounts and wire conduit make winch installation simple.

Body & Styling Features

Sporty Flame Red or natural Terra Green bodywork features sharply angled, high-clearance fenders while the full steel cargo racks help tackle any outdoors task.

Suzuki's plush T-shaped seat delivers rider mobility during sport or difficult terrain riding. Overall length is under 82 inches (208 cm), so the KingQuad fits into a 6.5-foot truck bed for easy transportation.

Heavy-duty front and rear cargo racks let you take advantage of the ATV’s superb load capabilities. Wrinkle paint finish on the racks and front bumper is durable and scratch resistant.

Full floorboards with integrated raised footpegs

Additional Features

Suzuki’s 24-month limited warranty is much longer than other ATV warranties. Longer coverage and other benefits are available through Suzuki Extended Protection (SEP).

A variety of Genuine Suzuki Accessories are available, including winches, windshield, front and rear bumpers, snowplow, aluminum skid pans, rack extensions, utility box, and more.

Minimum rider age: 16 years old

Specifications

Engine

Engine - 376cc (22.94 cubic in.), 4-stroke, air-cooled with SCAS, OHC single cylinder

Bore x Stroke - 82.0 mm x 71.2 mm (3.228 in. x 2.803 in.)

Compression Ratio - 9.0:1

Fuel System - Suzuki electronic fuel injection

Starter - Electric

Lubrication - Wet sump

Drivetrain

Transmission - Automatic variable ratio (V-belt), with high/low-range and reverse

Clutch - Dry shoe, automatic, centrifugal type

Driven Wheels - 2WD and 4WD

Final Drive - Shaft drive

Chassis

Suspension Front - Independent, double wishbone, coil spring, oil damped

Suspension Rear - Swing-arm type, coil spring, oil damped

Brakes Front - Disc brakes, twin rotors

Brakes Rear - Single drum brake

Tires Front - AT25 x 8-12, tubeless type x 2

Tires Rear - AT25 x 10-12, tubeless type x 2

Fuel Tank Capacity - 16.0 L (4.2 US gal.)

Color - Terra Green or Flame Red

Electrical

Ignition - Electronic ignition (transistorized)

Headlight - 12V 35/35W (HS1) × 2

Tail Light - 12V 21/5W

Dimensions

Overall Length - 2060 mm (81.1 in.)

Overall Width - 1145 mm (45.1 in.)

Overall Height - 1220 mm (48.0 in.)

Wheelbase - 1270 mm (50.0 in.)

Ground Clearance - 250 mm (9.8 in.)

Seat Height - 840 mm (33.1 in.)

Curb Weight - 265 kg (628 lb.)

Warranty

Warranty - 24-month limited warranty

Extension - Longer coverage periods with other benefits are available through Suzuki Extended Protection (SEP)