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2021 KingQuad 400FSi Utility ATV Review Specs Price

Suzuki created the world’s first four-wheel ATV in 1983. Suzuki ATVs are now ubiquitous. From the most isolated locations to the most mundane activities, the KingQuad will propel a rider forward. Our KingQuad lineup is a fantastic bunch of ATVs all around. For those who want a sportier ride, the Suzuki KingQuad 400FSi comes with a five-speed manual gearbox and a semi-automatic clutch. It produces a lot of torque and has an extensive power band for excellent performance on the trail or in the workplace. A high-performance iridium spark plug and revised Pulsed-secondary AIR-injection (PAIR) system contribute to exceptional fuel economy, clean emissions, and performance.

2021 KingQuad 400FSi Utility ATV – Features and Specs

2021 KingQuad 400FSi Utility ATV

Key Features

The powerful, fuel-injected 4-stroke engine consumes less petrol—a long-lasting manual gearbox with a semi-automatic clutch. A handlebar-mounted lever allows you to choose 2WD or 4WD. A large gasoline tank and a comfy seat provide a long and pleasant riding range. Rugged bodywork and plenty of rack space to handle any job

Engine Features

The 376cc, four-stroke, four-valve engine of the KingQuad 400FSi delivers economic power and driveability. Suzuki’s industry-leading fuel injection smooths power output, particularly in the mid-to-high range, and provides excellent cold starting. The technology optimizes ignition using 3-D maps, resulting in responsive yet environmentally friendly performance. To dissipate engine heat during heavy labor or load carrying, the Suzuki Advanced Cooling System (SACS) employs an oil cooler and a thermostat-controlled cooling fan.

When the rear brake is engaged, push-button electric starting allows you to start without shifting to neutral. Slip control logic is included in the Engine Control Unit (ECU), which changes fuel injector duration and timing to increase drivability and grip in loose/slippery circumstances. Iridium spark plugs are efficient, resulting in more excellent combustion, lower emissions, and longer plug life. Starting the engine at low temperatures is also enhanced. The Quad Bike’s pulsed-secondary AIR-injection (PAIR) system and catalyst-equipped exhaust system assist in meeting pollution regulations while retaining excellent performance.

Transmission Features

The five-speed gearbox with semi-automatic clutch and reverse enables the rider to choose the best gear for optimal traction and economy. With the flick of a handlebar-attached lever, you may select 2WD or 4WD. The shaft drive system is dependable and long-lasting, and it requires little maintenance. In 4WD mode, an all-new torque-sensing limited-slip front differential delivers maximum traction and light steering.High/low adjustable sub-transmission allows for a broad range of adaptability. The automotive gate-type gearshift lever will enable you to quickly choose a high or low range, neutral or reverse. The ECU contains a Reverse Mode that monitors vehicle speed, so increased engine rpm may be employed in reverse mode to get out of mud or loose dirt.

2021 KingQuad 400FSi Utility ATV

Chassis Features

The stylish bodywork of the KingQuad 400FSi variant boasts steeply slanted, high-clearance fenders. Suzuki’s distinctive T-shaped seat provides rider movement while tackling challenging terrain or during sport riding. It’s also soft for long-distance riding comfort. Because the whole length is less than 82 inches (208 cm), the KingQuad fits easily into a 6.5-foot truck bed. With 6.7-inch (170.1mm) wheel travel, the independent front A-arm suspension provides smooth performance and impressive ground clearance.

The rear suspension has a swing-arm design with 6.7 inches (170.1 mm) of wheel travel and dual shock absorbers for nimble handling and smooth riding. Dual front hydraulic disc brakes include massive 34mm pistons and a huge brake-pad surface area for greater stopping power and longevity. Carlisle tires with aggressive tread provide constant traction in rainy weather while remaining quiet and smooth on hard-packed terrain. The tires are placed on rugged steel wheels powder-coated with a durable matte black finish. Plastic skid plates are lightweight and durable enough to resist trail hammering while remaining slick sufficient to allow objects to slide underneath.

Utility / Convenience Features

The unusual KingQuad grille design has dual 35-watt headlights (with high and low settings). A bright tail light aids the visibility of the ATV in low-light environments. Heavy-duty front and rear luggage racks enable you to use the ATV’s exceptional load capacity. The shelves and front bumper have a scratch-resistant wrinkle paint finish. The LCD instrumentation features a speedometer, odometer, trip meter, hour meter, clock, gasoline gauge, reverse, neutral, oil, and FI indications. On the new front fender is an automotive-style DC power outlet. Winch-ready mounts and wire conduit simplify winch installation. The large 4.2-gallon (16.0 L) gasoline tank gives excellent riding range. Protection is offered by complete flooring with incorporated elevated footpegs. Winches, windshields, front and rear bumpers, snowplows, aluminum skid pans, rack extensions, utility boxes, and other Suzuki Genuine Accessories are available.

2021 KingQuad 400FSi Utility ATV

Special Features

Limited guarantee of 12 months. Suzuki Extended Protection provides longer coverage durations as well as additional advantages. Operators must be at least 16-year old.

2021 KingQuad 400FSi Utility ATV – Price

The new 2021 KingQuad 400FSi Utility ATV is available at $6,599 only.

2021 KingQuad 400FSi Utility ATV – Technical Specifications


Engine 376cc (22.94 cubics in.), 4-stroke, air-cooled with SCAS, OHC single cylinder
Bore x Stroke 82.0 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


Transmission 5-speed forward constant mesh, with high/low range and reverse
Clutch Dry shoe, automatic, centrifugal type
Driven Wheels 2WD and 4WD
Final Drive Shaft drive


Suspension Front Independent, double wishbone, coil spring, oil damped
Suspension Rear Swingarm 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

2021 KingQuad 400FSi Utility ATV


Ignition Electronic ignition (transistorized)
Headlight 12V 35/35W (HS1) × 2
Tail Light 12V 21/5W


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 279 kg (615 lb.)


Warranty 12-month limited warranty
Extension Extended coverage periods, including other benefits, are available through Suzuki Extended Protection (SEP)

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