Engineered by Honda for the naked motorcycle segment, the 2021 Honda CB300R relies on a 286 cc (17.5 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 34.9 HP (25.5 kW) at 10,500 rpm while maximum torque reaches 22.9 Nm (16.9 lb-ft), transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 122 HP per liter, 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 CB300R measures 143.8 kg (317 lbs) wet (curb), translating to a power-to-weight ratio of 0.24 HP/kg (4.12 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,354 mm (53.3 in) wheelbase engineered for quick, flickable steering geometry. The 10.22-liter (2.7 US gal) fuel tank paired with a rated consumption of 3.31 L/100 km provides an estimated theoretical range of roughly 309 km (192 miles) between fill-ups.
Within MotoLibrary's Honda archive, this model family spans 7 indexed model years from 2019 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
122 HP/L
Power-to-Weight
0.24 HP/kg (4.12 kg/HP)
Theoretical Range
~309 km (192 mi)
Engine
Displacement286.0 ccm (17.45 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power34.9 HP (25.5 kW)) @ 10500 RPM
Torque22.9 Nm (2.3 kgf-m or 16.9 ft.lbs)
Compression10.7:1
Bore x Stroke76.0 x 63.0 mm (3.0 x 2.5 inches)
Valves/Cylinder4
Fuel SystemInjection. Fuel injection with 38mm throttle body
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionComputer-controlled digital transistorized with electronic advance
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet multiplate with coil springs
Performance
Fuel Consumption3.31 litres/100 km (30.2 km/l or 71.06 mpg)
Greenhouse Gases76.8 CO2 g/km. (CO2 - Carbon dioxide emission)
Emission DetailsMeets current EPA standards. Models sold in California meet current CARB standards and may differ slightly due to emissions equipment.
Chassis
Frame TypeSteel tube
Rake24.7°
Trail93 mm (3.7 inches)
Front Suspension41mm telescopic fork
Front Travel130 mm (5.1 inches)
Rear SuspensionPro-Link single shock with five positions of spring preload adjustability
Rear Travel107 mm (4.2 inches)
Wheelbase1354 mm (53.3 inches)
Wheels & Brakes
Front Tyre110/70-17
Rear Tyre150/60-17
Front BrakesSingle disc. ABS
Front Brake Ø296 mm (11.7 inches)
Rear BrakesSingle disc. ABS
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Weight incl.143.8 kg (317.0 pounds)
Seat Height800 mm (31.5 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.
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.
