Positioned in Sinnis's scooter motorcycle lineup, the 2021 Sinnis Matrix 3i relies on a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 8.3 HP (6.1 kW) at 7,500 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 66.4 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 Matrix 3i measures 135 kg (298 lbs) wet (curb), translating to a power-to-weight ratio of 0.06 HP/kg (16.27 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. The 6.5-liter (1.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
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
66.4 HP/L
Power-to-Weight
0.06 HP/kg (16.27 kg/HP)
Standover Height
710 mm (28 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power8.3 HP (6.1 kW)) @ 7500 RPM
Valves/Cylinder2
Fuel SystemInjection. EFI
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionElectronic ECU / TCI
LubricationWet sump forced lubrication with trochoidal pump
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAutomatic centrifugal dry clutch
DrivelineV-belt automatic transmission (CVT)
Chassis
Frame TypeTubular steel underbone frame
Front SuspensionTelescopic Forks
Rear SuspensionTwin Coil Spring
Wheelbase1370 mm (53.9 inches)
Wheels & Brakes
Front Tyre130/60-13
Rear Tyre130/60-13
Front Tire Pressure1.8 bar (26 psi)
Rear Tire Pressure2.0 bar (29 psi)
Front BrakesSingle disc. Hydraulic.
Rear BrakesSingle disc. Hydraulic.
WheelsFront Tyre
Dimensions & Weight
Dry Weight119.0 kg (262.4 pounds)
Weight incl.135.0 kg (297.6 pounds)
Power/Weight0.0697 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.
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.
