The Suzuki DR-Z400SM is a street legal bike for serious dirt bike enthusiasts. It's not uncommon to take the SuperMoto down a twisty forest trail as well as a tight canyon corners. Its 398cc liquid-cooled, four-stroke engine provides strong low-rpm torque and crisp throttle response for any of these occasions. They key difference from the DR-Z400SM and the DR-Z400S is the inverted forks. Inverted front forks contribute to less unsprung weight and improved overall handling.
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Key Features
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Suzuki's Supermotard model based on DR-Z400S - combines Supermotard style and features in a narrow, lightweight street-legal package
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Engine Features
Automatic decompression system for quick/easy engine starts
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Compact 4-valve cylinder head with 36mm intake valves, 29mm exhaust valves, narrow 28-degree included valve angle and shim-under-bucket valve adjustment system |
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Electric start with lightweight starter motor and a compact 6.5 amp maintenance-free battery |
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Forged aluminum piston is 10 percent lighter than a cast piston and receives additional oil-cooling to the piston crown through a crankcase oil jet |
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Lightweight 398cc, DOHC, liquid-cooled, dry-sump engine produces strong, tractable low-rpm power |
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SCEM-plated cylinder (nickel-silicon-phosphorous) is lighter and more durable than an iron liner with excellent heat transfer properties |
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Smooth throttle response with a Mikuni™ BSR36 CV-type carburetor fed by 6-liter airbox. The left side cover has quick-release fasteners for easy access to the air filter |
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Thermostatically controlled cooling fan mounted to the left radiator helps maintain consistent operating temperature in traffic |
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Transmission Features
Additional weight savings with magnesium valve cover, clutch cover, and magneto cover
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Compact 5-speed transmission utilizes a cable-operated clutch with separate outer cover for simplified clutch maintenance |
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Chassis Features
A fully adjustable rear shock absorber with high/low speed compression damping adjuster and aluminum swingarm for precise rear wheel control
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A bolt-on aluminum subframe helps reduce weight and simplify maintenance |
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RK Excel aluminum rims and radial tires: 120/70-R17 front, 140/70- R17 rear |
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Chrome-moly steel frame tuned for Supermoto style riding is torsionally strong with minimal weight. The backbone tube, front down tube, and steering head gussets form the dry-sump engine oil tank |
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Long travel, Showa-brand inverted front fork derived from RM250 - features adjustable compression/rebound damping and alumite coating on inner tube surfaces for smooth action |
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Strong braking performance supplied by a front disc brake with a large 300mm floating-type rotor and dual-piston caliper, plus 240mm rear disc brake with single-piston caliper |
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Transmission Features
Additional weight savings with magnesium valve cover, clutch cover, and magneto cover
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Compact 5-speed transmission utilizes a cable-operated clutch with separate outer cover for simplified clutch maintenance |
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Compact digital instrument cluster with speedometer, odometer, twin-trip meters with addition/subtraction capability, clock, timer and stopwatch functions |
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On-road legal lighting with bright 60/55 watt halogen headlight, compact tail/stoplight, lightweight, rubber-mounted turn signals and horn |
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Renthal tapered aluminum handlebar for reduced vibration and an aggressive look |
