Dirt Bikes

2025 Suzuki DR-Z4S Technical Information

Features and specifications of Suzuki’s new-for-2025 dual sport bike that replaces the DR-Z400S.

April 4, 2025

Not long after its debut in 2000, the DR-Z400S became a popular sight far and wide—both in the dirt and on the road. Willing and able to tackle everything from vet motocross tracks to freeways, this Suzuki proved capable across different riding types and terrain, making it an ideal machine of choice for dual sport enthusiasts who live (and ride motorcycles) by the famous line in William Cowper’s poem, The Task, that “Variety’s the very spice of life.”

No longer compliant with the latest regulations in some countries, the DR-Z400S had to be updated to satisfy the demands of today’s market such as Euro 5 emissions standards, OBD II requirements, and regulations pertaining to brake systems and noise. Suzuki answered the call and created the DR-Z4S—a more modern version of the well-loved DR-Z400S. We’ve yet to ride the DR-Z4S, and while we await the opportunity to do so, we’ve compiled some technical information about it with corresponding photos here.

The DR-Z400S enjoyed a successful run in Suzuki’s lineup. The DR-Z4S (pictured) replaces it for 2025 and beyond.Suzuki

The DR-Z4S is powered by a liquid-cooled DOHC four-stroke 398cc single-cylinder engine. Displacement, bore, and stroke are all the same as the DR-Z400S at 398cc, 90.0mm, and 62.6mm, respectively. A notable difference is the DR-Z4S is fuel injected rather than carbureted like the DR-Z400S.Suzuki

Compression ratio is reduced slightly from the DR-Z400S at 11.1:1, and gearbox remains a five-speed.Suzuki

A new piston design is said to help achieve smoother engine operation and reduce mechanical loss.Suzuki

Titanium intake valves and hollow sodium-filled exhaust valves are designed to assist in maximizing combustion efficiency and performance.Suzuki

Camshaft profiles are new for greater intake lift and optimized valve overlap, both of which contribute to better engine performance and Euro 5 emissions compliance.Suzuki

Why dual spark plugs? To help maximize combustion efficiency and performance across the engine’s operating range, Suzuki says.Suzuki

A 42mm throttle body is employed on the DR-Z4S, which replaces the Mikuni BSR36 carburetor found on the DR-Z400S.Suzuki

Suzuki Clutch Assist System (SCAS) is said to provide positive clutch engagement off- and on-road, and smoother deceleration and gear changes.Suzuki

The assist function leverages a cam to engage the clutch sleeve hub and pressure disc together, and is designed to efficiently transfer torque to the rear wheel under acceleration, all while using softer clutch springs.Suzuki

The slipper clutch partially disengages when downshifting to mitigate the effect of engine-braking.Suzuki

Every aspect of the new airbox design, including its capacity and outlet shape, is aimed at reducing intake air resistance.Suzuki

Exhaust system features a dual-stage catalytic converter that helps satisfy Euro 5 emissions standards.Suzuki

There’s no shortage of sensors on the DR-Z4S. Position sensors alone including ones for crankshaft, gear, accelerator, and throttle. Other sensors are for intake air temperature, and front and rear wheel speed. This diagram also shows the electric throttle valve, ECM, ABS unit, ignition coil, instrument cluster, and left handlebar switch.Suzuki

The ABS unit. Available ABS modes on the DR-Z4S are front and rear on, front on and rear off, and front and rear off.Suzuki

In the suspension department, a KYB inverted fork that’s compression and rebound damping adjustable offers 11 inches of travel. In the rear a KYB shock that’s tunable for spring preload, compression damping, and rebound damping has 11.7 inches of travel.Suzuki

Frame construction remains steel, but it’s newly designed to enhance stability while still being responsive to rider inputs.Suzuki

One of Suzuki’s goals with the new chassis is to make the DR-Z4S even more effective on twisty trails than the DR-Z400S.Suzuki

An aluminum skid plate (or “under cover,” as Suzuki calls it) is fitted to the DR-Z4S in stock trim.Suzuki

Brake disc sizes increase by 20mm front and rear over the DR-Z400S. Stock tires on the DR-Z4S are IRC’s Trail Winner GP-410.Suzuki

Footpegs are a wider design.Suzuki

In an effort to improve rider comfort, Suzuki optimized seat width.Suzuki

Fuel tank is newly designed to be compact and lightweight.Suzuki

An LED headlight incorporates low and high beams into a single projector module.Suzuki

Rear combination light is new and features LEDs too.Suzuki

Control area is chock-full of more advanced technological features.Suzuki

LCD instrument panel is newly designed and one of the many components shared with the DR-Z4SM supermoto model.Suzuki

Selecting modes and changing settings of the electronic rider-assist systems is done by mode button, and up and down switches on the left side of the handlebar, where there’s also turn signals and a button for the horn.Suzuki

On the right side of the handlebar are engine start, engine stop, and hazard light buttons.Suzuki

Grips were changed from full-waffle to half-waffle.Suzuki

Mirrors are new and have a parallelogram shape.Suzuki

The Hamamatsu manufacturer took care to ensure the new bodywork hugs the chassis tightly, and finished it off with modern and simple radiator shroud graphics.Suzuki

Suzuki’s DR-Z4S is available in two colors— Champion Yellow No. 2/Solid Special White No. 2 (left) and Solid Iron Gray (right). Suggested retail price is $8999.Suzuki

2025 Suzuki DR-Z4S Specs

MSRP:	$8999
Engine:	DOHC, liquid-cooled single-cylinder; 4-valve
Displacement:	398cc
Bore x Stroke:	90.0 x 62.6mm
Compression Ratio:	11.1:1
Transmission/Final Drive:	5-speed/chain
Fuel System:	EFI w/ 42mm throttle body
Clutch:	Wet, multiplate slipper/assist; cable actuation
Frame:	Steel twin-spar
Front Suspension:	KYB inverted fork, compression and rebound damping adjustable; 11.0 in. travel
Rear Suspension:	KYB shock, spring preload, compression damping, and rebound damping adjustable; 11.7 in. travel
Front Brake:	Nissin 2-piston caliper, 270mm disc
Rear Brake:	Nissin 1-piston caliper, 240mm disc
Tires, Front/Rear:	IRC Trail Winner GP-410; 80/100-21 / 120/80-18
Rake/Trail:	27.5°/4.3 in.
Wheelbase:	58.9 in.
Ground Clearance:	11.8 in.
Claimed Seat Height:	36.2 in.
Fuel Capacity:	2.3 gal.
Claimed Wet Weight:	333 lb.
Availability:	April 2025
Contact:	suzukicycles.com