2011 Yamaha Cygnus X SR Technical Analysis & Specification Breakdown
Positioned in Yamaha's scooter motorcycle lineup, the 2011 Yamaha Cygnus X SR relies on a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 11 HP (8 kW) at 8,500 rpm while maximum torque reaches 9.3 Nm (6.9 lb-ft) at 7,500 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 88 HP per liter and a 1,000 rpm working window between peak torque (7,500 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 Cygnus X SR measures 122 kg (269 lbs) wet (curb), translating to a power-to-weight ratio of 0.09 HP/kg (11.09 kg per horsepower). Rider ergonomics and chassis geometry center around a 785 mm (30.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,295 mm (51 in) wheelbase engineered for quick, flickable steering geometry. The 7.1-liter (1.9 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 110 km/h (68 mph).
Within MotoLibrary's Yamaha archive, this model family spans 4 indexed model years from 2011 to 2015, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
88 HP/L
Power-to-Weight
0.09 HP/kg (11.09 kg/HP)
Power Band Window
7,500–8,500 rpm
Standover Height
785 mm (30.9 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power11.0 HP (8.0 kW)) @ 8500 RPM
Torque9.3 Nm (0.9 kgf-m or 6.9 ft.lbs) @ 7500 RPM
Compression10.0:1
Bore x Stroke52.4 x 57.9 mm (2.1 x 2.3 inches)
Fuel SystemInjection
Fuel ControlOverhead Cams (OHC)
IgnitionTCI
LubricationWet sump
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
Performance
Top Speed110.0 km/h (68.4 mph)
Chassis
Front SuspensionTelescopic fork
Front Travel78 mm (3.1 inches)
Rear SuspensionUnit swing
Rear Travel96 mm (3.8 inches)
Wheelbase1295 mm (51.0 inches)
Ground Clearance113 mm (4.4 inches)
Wheels & Brakes
Front Tyre110/70-12
Rear Tyre120/70-12
Front BrakesSingle disc
Front Brake Ø216 mm (8.5 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø150 mm (5.9 inches)
Dimensions & Weight
Dry Weight114.0 kg (251.3 pounds)
Weight incl.122.0 kg (269.0 pounds)
Power/Weight0.0965 HP/kg
Seat Height785 mm (30.9 inches) If adjustable, lowest setting.
Overall Height1130 mm (44.5 inches)
Overall Length1855 mm (73.0 inches)
Overall Width685 mm (27.0 inches)
Fuel Capacity7.10 litres (1.88 US gallons)
Other
StarterElectric & kick
Color OptionsWhite, black
Carrying Capacityfull-size helmet storage under the dual seat. Glovebox in the knee-panel
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.
