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MotoLibrary Score
41/100Commuter
Power/Weight
0.25 hp/kg
Torque
35 Nm
Engine
399 ccm
Technical Overview
2018 Benelli 402 S Technical Analysis & Specification Breakdown
Positioned in Benelli's naked motorcycle lineup, the 2018 Benelli 402 S relies on a 399.3 cc (24.4 cu in) liquid-cooled twin, four-stroke powerplant. In factory specification, peak output is rated at 39.4 HP (28.8 kW) at 9,000 rpm while maximum torque reaches 35 Nm (25.8 lb-ft) at 7,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 98.7 HP per liter and a 2,000 rpm working window between peak torque (7,000 rpm) and peak power (9,000 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the 402 S measures 160 kg (353 lbs) dry, translating to a power-to-weight ratio of 0.25 HP/kg (4.06 kg per horsepower). Rider ergonomics and chassis geometry center around a 740 mm (29.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,405 mm (55.3 in) wheelbase engineered for quick, flickable steering geometry. The 16-liter (4.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
98.7 HP/L
Power-to-Weight
0.25 HP/kg (4.06 kg/HP)
Power Band Window
7,000–9,000 rpm
Standover Height
740 mm (29.1 in)
Engine
Displacement399.3 ccm (24.37 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsHorizontal cylinder
Power39.4 HP (28.8 kW)) @ 9000 RPM
Torque35.0 Nm (3.6 kgf-m or 25.8 ft.lbs) @ 7000 RPM
Compression11.5:1
Bore x Stroke69.0 x 53.4 mm (2.7 x 2.1 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet
Chassis
Frame TypeSteel trestle in steel tubes
Front SuspensionInverted hydraulic damping shock absorber
Front Travel125 mm (4.9 inches)
Rear SuspensionRear swing arm in steel pipes, rear shock absorber with spring preload adjustmen
Rear Travel45 mm (1.8 inches)
Wheelbase1405 mm (55.3 inches)
Ground Clearance180 mm (7.1 inches)
Wheels & Brakes
Front Tyre120/70-ZR17
Rear Tyre160/60-ZR17
Front BrakesDouble disc
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc
Rear Brake Ø240 mm (9.4 inches)
WheelsAluminum alloy
Dimensions & Weight
Dry Weight160.0 kg (352.7 pounds)
Power/Weight0.2463 HP/kg
Seat Height740 mm (29.1 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
