Positioned in Jonway's custom - cruiser motorcycle lineup, the 2023 Jonway Weiba YY400-5 features a 400 cc (24.4 cu in) liquid-cooled v2, four-stroke configuration. In factory specification, peak output is rated at 31.5 HP (23 kW) at 8,500 rpm while maximum torque reaches 28 Nm (20.7 lb-ft) at 7,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. With a specific output of 78.8 HP per liter and a 1,500 rpm working window between peak torque (7,000 rpm) and peak power (8,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the Weiba YY400-5 measures 165 kg (364 lbs) wet (curb), translating to a power-to-weight ratio of 0.19 HP/kg (5.24 kg per horsepower). Rider ergonomics and chassis geometry center around a 710 mm (28 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,430 mm (56.3 in) wheelbase engineered for balanced agility and highway composure. The 18-liter (4.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 140 km/h (87 mph).
Specific Output
78.8 HP/L
Power-to-Weight
0.19 HP/kg (5.24 kg/HP)
Power Band Window
7,000–8,500 rpm
Standover Height
710 mm (28 in)
Engine
Displacement400.0 ccm (24.41 cubic inches)
Engine TypeV2, four-stroke
Power31.5 HP (23.0 kW)) @ 8500 RPM
Torque28.0 Nm (2.9 kgf-m or 20.7 ft.lbs) @ 7000 RPM
Bore x Stroke62.0 x 66.0 mm (2.4 x 2.6 inches)
Fuel SystemInjection. Delphi
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
Performance
Top Speed140.0 km/h (87.0 mph)
ExhaustStainless steel
Chassis
Frame TypeSteel
Front SuspensionTelescopic fork
Rear SuspensionAdjustable dual shocks
Wheelbase1430 mm (56.3 inches)
Ground Clearance140 mm (5.5 inches)
Wheels & Brakes
Front Tyre120/80-16
Rear Tyre150/80-15
Front BrakesDouble disc. ABS
Rear BrakesSingle disc. ABS
WheelsCast alloy
Dimensions & Weight
Weight incl.165.0 kg (363.8 pounds)
Seat Height710 mm (28.0 inches) If adjustable, lowest setting.
Overall Height1120 mm (44.1 inches)
Overall Length2080 mm (81.9 inches)
Overall Width860 mm (33.9 inches)
Fuel Capacity18.00 litres (4.76 US gallons)
Other
StarterElectric
Color OptionsSilver, white, green, grey, yellow, red
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.
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.
