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MotoLibrary Score
36/100Commuter
Power/Weight
0.11 hp/kg
Torque
22 Nm
Engine
279 ccm
Technical Overview
2015 Honda Forza Si Technical Analysis & Specification Breakdown
Built around Honda's scooter motorcycle platform, the 2015 Honda Forza Si features a 279 cc (17 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 22 HP (16.1 kW) at 7,500 rpm while maximum torque reaches 22 Nm (16.2 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 78.9 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 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 Forza Si measures 201 kg (443 lbs) dry, translating to a power-to-weight ratio of 0.11 HP/kg (9.14 kg per horsepower). Rider ergonomics and chassis geometry center around a 755 mm (29.7 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,540 mm (60.6 in) wheelbase engineered for planted straight-line stability. The 12-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
78.9 HP/L
Power-to-Weight
0.11 HP/kg (9.14 kg/HP)
Power Band Window
6,000–7,500 rpm
Standover Height
755 mm (29.7 in)
Engine
Displacement279.0 ccm (17.02 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power22.0 HP (16.1 kW)) @ 7500 RPM
Torque22.0 Nm (2.2 kgf-m or 16.2 ft.lbs) @ 6000 RPM
Compression10.2:1
Bore x Stroke68.0 x 68.5 mm (2.7 x 2.7 inches)
Valves/Cylinder4
Fuel SystemInjection. PGM-Fi
Fuel ControlSingle Overhead Cams (SOHC)
LubricationForce-fed and splash
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchDry-type, multi-plate shoe
DrivelineCVT
Chassis
Frame TypeUnderbone type
Rake27.0°
Trail92 mm (3.6 inches)
Front SuspensionTelescopic fork
Rear SuspensionUnit Swing
Wheelbase1540 mm (60.6 inches)
Ground Clearance135 mm (5.3 inches)
Wheels & Brakes
Front Tyre110/90-13
Rear Tyre140/70-13
Front BrakesSingle disc. ABS
Front Brake Ø256 mm (10.1 inches)
Rear BrakesSingle disc. ABS
Rear Brake Ø249 mm (9.8 inches)
Dimensions & Weight
Dry Weight201.0 kg (443.1 pounds)
Power/Weight0.1095 HP/kg
Seat Height755 mm (29.7 inches) If adjustable, lowest setting.
Overall Height1180 mm (46.5 inches)
Overall Length2185 mm (86.0 inches)
Overall Width750 mm (29.5 inches)
Fuel Capacity12.00 litres (3.17 US gallons)
Other
StarterElectric
Color OptionsBlack, black/beige, red, white
Carrying CapacityUnderseat storage for two full-face helmets.
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.
