2025 Suzuki DR-Z4SM

New twin-spar steel frame and aluminum sub-frame give exceptional torsional rigidity and greatly enhance the DR-Z4SM’s handling characteristics.
New piston design helps achieve smoother engine operation while new radiator with larger fan diameter improves cooling.
New long-travel, adjustable KYB inverted front fork and fully adjustable KYB rear suspension are easy to tune for the conditions while new, Dunlop SPORTMAX Q5A sportbike tires (17 in. front and rear) provide optimum traction both on road and on track.
Now equipped with Electronic Fuel Injection, the DR-Z4SM’s engine is fed through an electronically controlled (Ride-by-Wire) throttle body with a 42 mm bore and a 10-hole injector that significantly improves engine response, idle speed control and peak power output.
Fully revised 398cc single-cylinder four-valve DOHC engine delivers a smooth, controllable spread of torque from low RPM up through peak power. New higher-lift camshafts with reduced overlap press upon new titanium intake valves.
All of the DR-Z4SM’s lighting is low-draw LED type, including the new bifunction LED headlight that incorporates both the high- and low-beam functions into one, bright projector module.
New LCD instrument panel features a straightforward, legible display that supplies critical real-time operating information and allows easy adjustments to S.I.R.S setting changes. Popular features like twin trip meters are joined by a new fuel level indicator.
New Suzuki Intelligent Ride System (S.I.R.S.) suite includes the three-mode Suzuki Drive Mode Selector (SDMS), four-mode Suzuki Traction Control System* (STCS) that includes a G mode for loose surfaces, the ABS** (Antilock Brake System) with switchable ABS Rear OFF mode, and the Suzuki Easy Start system that automatically starts the engine with a momentary press of a button.
New tapered aluminum handlebars with half-waffle grips, wide rider pegs with removable, vibration-damping rubber inserts, and a new seat with shape and foam optimized for comfort. The new compact, light-weight fuel tank retains the 2.3 US gal. (8.7 L) capacity.
New air cleaner box and inlet tube designed to improve intake air flow and generate sharp throttle response with powerful low-speed torque. The left side body cover has a quick-release fastener, and swings open like a door, retaining the popular, easy access to the air filter element.
Minimalistic and sleek, styling visually confirms that the DR-Z4SM is an extremely capable on-track motorcycle. Riders can choose the Solid Special White No. 2 bodywork or Sky Gray plastics that blend well with the many blacked-out chassis components.
New slim exhaust system has large-diameter, stainless steel head- and mid-pipes, plus a double wall silencer design to reduce heat transfer to the rider or passenger.
The DR-Z4SM is powered by a thoroughly updated 398cc single-cylinder four-valve DOHC engine that delivers a smooth, controllable spread of torque from low RPM up through peak power. The redesigned cylinder head has optimized shapes for the intake port, intake valve boundary, and a smooth, flat combustion chamber that produces better combustion to provide consistent power under low loads with strong power output under heavier loads. The DOHC cylinder head contains a pair of lightweight titanium intake valves and a pair of hollow, sodium filled exhaust valves that help maximize combustion efficiency and performance.
Every aspect of the new air cleaner box design was studied and updated, including its capacity and outlet shape, to improve intake air flow. The length of the inlet tube and the diameter of its mouth were designed to achieve balance between intake air sound and the engine’s power delivery to generate sharp throttle response and powerful low-speed torque. The left side body cover has a quick-release fastener, and swings open like a door, retaining the popular, easy access to the air filter element.
New camshaft profiles have increased intake lift and op