2025 KingQuad 400FSi

2025 KingQuad 400FSi Overview

In 1982, Suzuki introduced the world's first 4-wheel ATV. Today, Suzuki ATVs are everywhere. From the most remote areas to the most everyday tasks, you will find the KingQuad powering a rider onward. Across the board, our KingQuad lineup is an exceptional group of ATVs.

For riders who favor a sportier performance, the 2025 Suzuki KingQuad 400FSi features a five-speed manual-shift transmission and semi-automatic clutch. This engine is always willing as it cranks out an impressive amount of torque and has an incredibly wide powerband for exceptional performance on the trail...

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Terra Green

Key Features

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The KingQuad 400FSi’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 rideability and grip in loose/slippery conditions.

Five-speed transmission with semi-automatic clutch with reverse allows the rider to select the ideal gear for maximum traction and fuel efficiency.

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

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

High/low selectable sub-transmission provides wide-ranging versatility.

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 provide agile handling and plush riding.

Dual front hydraulic disc brakes feature calipers with large, 34mm pistons and wide brake-pad surface areas for ample stopping power while providing outstanding durability.

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

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

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.

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

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

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

Suzuki's exclusive T-shaped seat delivers rider mobility during sport riding or tackling difficult terrain. It is also plush for extended riding comfort.

Lightweight and durable plastic skid plates are sturdy to withstand trail pounding, yet slippery to help obstacles slide under easily.

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

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

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).

Specifications

  • Engine376cc (22.94 cubic in.), 4-stroke, air-cooled with SCAS, OHC single cylinder
  • Bore x Stroke82.0 x 71.2 mm (3.228 in. x 2.803 in.)
  • Compression Ratio9.0:1
  • Fuel SystemSuzuki electronic fuel injection
  • StarterElectric
  • LubricationWet sump
  • Transmission5-speed forward constant mesh, with high/low range and reverse
  • ClutchDry shoe, automatic, centrifugal type
  • Driven Wheels2WD and 4WD
  • Final DriveShaft drive
  • Suspension FrontIndependent, double wishbone, coil spring, oil damped
  • Suspension RearSwingarm type, coil spring, oil damped
  • Brakes FrontDisc brakes, twin rotors
  • Brakes RearSingle drum brake
  • Tires FrontAT25 x 8-12, tubeless type x 2
  • Tires RearAT25 x 10-12, tubeless type x 2
  • Fuel Tank Capacity16.0 L (4.2 US gal.)
  • ColorTerra Green or Flame Red
  • IgnitionElectronic ignition (transistorized)
  • Headlight12V 35/35W (HS1) × 2
  • Tail Light12V 21/5W
  • Overall Length2060 mm (81.1 in.)
  • Overall Width1145 mm (45.1 in.)
  • Overall Height1220 mm (48.0 in.)
  • Wheelbase1270 mm (50.0 in.)
  • Ground Clearance250 mm (9.8 in.)
  • Seat Height840 mm (33.1 in.)
  • Curb Weight279 kg (615 lb.)
  • Warranty24-month limited warranty
  • ExtensionLonger coverage periods with other benefits are available through Suzuki Extended Protection (SEP)

Financing

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*Manufacturer’s Suggested Retail Price (also referred to as “MSRP”, “Base MSRP” or the “Starting At” price), excludes taxes, title, license and registration fees, destination freight and delivery charges, dealer fees, and optional equipment.

**Payments are estimates only and subject to actual available finance rates which customer may qualify for on a given model. Not all buyers will qualify. Approved rates and terms will be based on credit worthiness. APR and Customer Cash offers cannot be combined.

†Freight surcharge is effective on certain MY22, MY23, and MY24 models shipped on or after March 1, 2022. See dealer for details.

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