Built around Cleveland's classic motorcycle platform, the 2021 Cleveland Ace 400 features a 397 cc (24.2 cu in) oil & air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 42 HP (30.7 kW) at 9,200 rpm while maximum torque reaches 34 Nm (25.1 lb-ft) at 7,650 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 105.8 HP per liter and a 1,550 rpm working window between peak torque (7,650 rpm) and peak power (9,200 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 Ace 400 measures 150 kg (331 lbs) dry, translating to a power-to-weight ratio of 0.28 HP/kg (3.57 kg per horsepower). Rider ergonomics and chassis geometry center around a 790 mm (31.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,410 mm (55.5 in) wheelbase engineered for quick, flickable steering geometry. The 15-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Cleveland archive, this model family spans 2 indexed model years from 2021 to 2022, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
105.8 HP/L
Power-to-Weight
0.28 HP/kg (3.57 kg/HP)
Power Band Window
7,650–9,200 rpm
Standover Height
790 mm (31.1 in)
Engine
Displacement397.0 ccm (24.22 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power42.0 HP (30.7 kW)) @ 9200 RPM
Torque34.0 Nm (3.5 kgf-m or 25.1 ft.lbs) @ 7650 RPM
Compression8.8:1
Bore x Stroke85.0 x 70.0 mm (3.3 x 2.8 inches)
Fuel SystemInjection. Delphi
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionCDI
CoolingOil & air
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet, multi-disc
Chassis
Frame TypeTubular backbone, double cradle
Front SuspensionInverted forks
Rear SuspensionTwin coil over oil damped shocks
Wheelbase1410 mm (55.5 inches)
Wheels & Brakes
Front Tyre90/90-18
Rear Tyre120/80-16
Front BrakesDouble disc. ABS, 4 piston radial mount caliper
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc. ABS
Rear Brake Ø220 mm (8.7 inches)
WheelsWire spoked
Dimensions & Weight
Dry Weight150.0 kg (330.7 pounds)
Power/Weight0.2800 HP/kg
Seat Height790 mm (31.1 inches) If adjustable, lowest setting.
Overall Length2050 mm (80.7 inches)
Overall Width795 mm (31.3 inches)
Fuel Capacity15.00 litres (3.96 US gallons)
Other
StarterElectric & kick
Color OptionsBlack, red, blue
Notes
US brand also called Cleveland Cycle Werks (CCW). Bike made in China.
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.
