Engineered by Sinnis for the custom - cruiser motorcycle segment, the 2021 Sinnis Hoodlum 125 relies on a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 11.1 HP (8.1 kW) at 9,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 88.8 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the Hoodlum 125 measures 135 kg (298 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.16 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 1,370 mm (53.9 in) wheelbase engineered for quick, flickable steering geometry.
Within MotoLibrary's Sinnis archive, this model family spans 2 indexed model years from 2020 to 2021, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
88.8 HP/L
Power-to-Weight
0.08 HP/kg (12.16 kg/HP)
Standover Height
710 mm (28 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsZS 125
Power11.1 HP (8.1 kW)) @ 9500 RPM
Fuel SystemInjection. EFI
Fuel ControlOverhead Cams (OHC)
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Chassis
Front SuspensionTelescopic USD
Rear SuspensionTwin coil spring, adjustable
Wheelbase1370 mm (53.9 inches)
Wheels & Brakes
Front Tyre100/80-17
Rear Tyre130/90-15
Front BrakesSingle disc
Rear BrakesSingle disc
WheelsWire spoked
Dimensions & Weight
Dry Weight135.0 kg (297.6 pounds)
Power/Weight0.0824 HP/kg
Seat Height710 mm (28.0 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.
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.
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.
