User Rating: /5 · No user ratings yet✓ Your rating was saved
MotoLibrary Score
38/100Commuter
Power
23 HP
Torque
27 Nm
Engine
399 ccm
Technical Overview
2017 Yamaha SR400 Yard Built by Krugger Technical Analysis & Specification Breakdown
Engineered by Yamaha for the allround motorcycle segment, the 2017 Yamaha SR400 Yard Built by Krugger relies on a 399 cc (24.4 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 22.9 HP (16.7 kW) at 6,500 rpm while maximum torque reaches 27.4 Nm (20.2 lb-ft) at 3,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 57.4 HP per liter and a 3,500 rpm working window between peak torque (3,000 rpm) and peak power (6,500 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
Rider ergonomics and chassis geometry center around a 1,410 mm (55.5 in) wheelbase engineered for quick, flickable steering geometry.
Specific Output
57.4 HP/L
Power Band Window
3,000–6,500 rpm
Engine
Displacement399.0 ccm (24.35 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power22.9 HP (16.7 kW)) @ 6500 RPM
Torque27.4 Nm (2.8 kgf-m or 20.2 ft.lbs) @ 3000 RPM
Compression8.5:1
Bore x Stroke87.0 x 62.7 mm (3.4 x 2.5 inches)
Valves/Cylinder2
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionTCI: Transistor Controlled Ignition
LubricationWet-sump
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet, Multiple Disc
Performance
Fuel Consumption3.56 litres/100 km (28.1 km/l or 66.07 mpg)
Greenhouse Gases82.6 CO2 g/km. (CO2 - Carbon dioxide emission)
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.
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.
