2025 Suzuki DR-Z4S Official Confirmed Specs and Complete Electronic Redesign Delta Briefing
Official technical spec delta briefing for the 2025 Suzuki DR-Z4S revealed at EICMA, marking the first ground-up redesign in 25 years. Replacing the carburetor setup, the 398cc DOHC single introduces 42mm EFI, Ride-by-Wire, and dual-spark tech (38 hp, 37 Nm). Equipped with S.I.R.S. electronics (3-level SDMS, 4-mode STCS with Gravel mode, multi-stage ABS Off) and 46mm KYB fully adjustable inverted forks (280mm travel) at 151 kg wet, it modernizes dual-sport agility.
Outgoing vs New OEM Specification & Fluid Delta Matrix
| Specification | Outgoing Generation | Confirmed 2025 Spec |
|---|---|---|
| Fuel Delivery and Throttle System | Mikuni BSR36 constant velocity carburetor with cable throttle (Euro 2/3 era) | 42mm bore Electronic Fuel Injection (EFI) with Ride-by-Wire electronic throttle (Euro 5+ compliant) |
| Combustion Chamber Ignition Architecture | Single spark plug per cylinder ignition system | Dual-spark technology utilizing two spark plugs per cylinder for clean, efficient combustion |
| Electronic Rider Assistance (S.I.R.S.) | No electronic assists (pure mechanical throttle without traction or power aids) | Suzuki Intelligent Ride System (S.I.R.S.) featuring 3 SDMS drive modes and 4-level STCS traction control with off-road Gravel mode |
| Brake System and ABS Control | Non-ABS conventional hydraulic single disc brakes front and rear | Bosch dual-channel ABS with selectable Off modes (Standard on, Mode 1 Rear Off, Mode 2 Front and Rear Off) |
| Front Suspension Architecture and Wheel Travel | 49mm conventional right-side-up cartridge fork (288mm travel) | 46mm KYB inverted long-travel fork (280mm stroke, fully adjustable compression and rebound damping) |
| Frame Chassis and Subframe Architecture | One-piece welded steel semi-double cradle frame structure | All-new twin-spar steel frame paired with a lightweight detachable aluminum rear subframe |
| Instrument Cluster and Lighting Equipment | Basic digital LCD speedometer with traditional halogen headlamp and bulb indicators | Comprehensive lightweight multi-function LCD digital display with compact full-LED lighting throughout |
All-New 398cc Powerplant with 42mm EFI and Dual-Spark Technology
At the mechanical core of the 2025 Suzuki DR-Z4S is a comprehensive ground-up redesign of the legendary 398cc liquid-cooled 4-stroke DOHC 4-valve single-cylinder engine. Retiring the long-serving Mikuni BSR36 carburetor, the new powerplant introduces an advanced 42mm electronic throttle body equipped with a 10-hole injector governed by Ride-by-Wire electronic management. While retaining the responsive 90.0 mm bore and 62.6 mm stroke geometry with an 11.1:1 compression ratio, Suzuki re-engineered the cylinder head to accommodate a dual-spark plug architecture. This setup achieves ultra-clean, uniform flame propagation compliant with stringent Euro 5+ emissions while delivering 38 hp (28 kW) at 8,000 rpm and 37 Nm of torque at 6,500 rpm. The result is surgical low-speed throttle precision over technical obstacles combined with muscular mid-range torque on open gravel roads.
Off-Road Dedicated S.I.R.S. Electronics and Multi-Mode ABS Disengagement
The 2025 DR-Z4S breaks new ground by introducing the sophisticated Suzuki Intelligent Ride System (S.I.R.S.) suite tailored for dual-sport adventuring. The Suzuki Drive Mode Selector (SDMS) presents three tailored throttle profiles: aggressive Mode A for crisp response, versatile Mode B for general riding, and softer Mode C for slippery terrain. The Suzuki Traction Control System (STCS) offers Mode 1, Mode 2, completely switchable OFF, and a dedicated G (Gravel) mode engineered specifically to permit calculated rear-wheel spin while preserving forward momentum on loose surfaces. Crucially, the Bosch dual-channel ABS system incorporates off-road versatility with multi-stage disengagement: riders can select standard ABS, Mode 1 (Rear ABS Off for controlled dirt brake slides), or Mode 2 (disengaging both front and rear ABS entirely) directly via handlebar controls.
New Twin-Spar Steel Chassis and KYB Fully Adjustable Inverted Suspension
The chassis architecture transitions from the classic cradle layout to an all-new twin-spar steel frame paired with a lightweight, detachable aluminum subframe, achieving superior torsional rigidity and agile trail feedback. Up front, 46mm KYB inverted cartridge forks deliver 280mm of stroke with full compression and rebound damping adjustability. In the rear, a linkage-assisted KYB piggyback monoshock provides 296mm of wheel travel featuring adjustable spring preload, rebound, and compression circuits. Riding on robust wire-spoked wheels with aluminum rims (21-inch front, 18-inch rear) shod in IRC GP-410 dual-purpose rubber, the DR-Z4S boasts 300mm of generous ground clearance and a 920mm seat height. With a wet curb weight of just 151 kg, it offers featherweight maneuverability across rock gardens, singletracks, and trans-continental trails.
Linked OEM Spec Sheets & Primary Source
New Model Maintenance & Fitment FAQ
What are the peak power and torque specifications for the 2025 Suzuki DR-Z4S?
Powered by the revamped 398cc liquid-cooled DOHC 4-valve single, the DR-Z4S delivers 38 hp (28 kW) at 8,000 rpm and 37 Nm of torque at 6,500 rpm. With 42mm electronic fuel injection and dual-spark combustion, it meets Euro 5+ emissions while enhancing low-to-mid rev response.
How have the suspension and curb weight changed compared to the previous DR-Z400S?
The legacy 49mm right-side-up fork is superseded by a modern 46mm KYB fully adjustable inverted fork (280mm travel) and a linkage rear shock (296mm wheel travel). Supported by a twin-spar steel chassis and aluminum subframe, wet curb weight is measured at 151 kg.
How does the ABS system function during off-road riding on the DR-Z4S?
Equipped with Bosch dual-channel ABS, riders can choose between standard road activation, Mode 1 (Rear ABS Off to allow controlled rear-wheel slide braking on trails), and Mode 2 (disengaging both front and rear ABS entirely for technical dirt maneuvers).
What are the factory wheel/tire sizes and fuel tank capacity on the DR-Z4S?
The bike runs wire-spoke aluminum rims shod in 80/100-21 M/C 51P front and 120/80-18 M/C 62P rear IRC GP-410 tube tires. Fuel tank capacity is 8.7 liters, ground clearance measures 300 mm, and seat height is set at 920 mm.