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MotoLibrary Score
34/100Commuter
Power/Weight
0.08 hp/kg
Torque
10 Nm
Engine
125 ccm
Technical Overview
2021 Yamaha Ray ZR 125Fi Technical Analysis & Specification Breakdown
Engineered by Yamaha for the scooter motorcycle segment, the 2021 Yamaha Ray ZR 125Fi utilizes a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 8.1 HP (5.9 kW) at 5,000 rpm while maximum torque reaches 9.7 Nm (7.2 lb-ft) at 5,000 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 64.8 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 Ray ZR 125Fi measures 99 kg (218 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (12.22 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 1,280 mm (50.4 in) wheelbase engineered for quick, flickable steering geometry. The 5.2-liter (1.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
64.8 HP/L
Power-to-Weight
0.08 HP/kg (12.22 kg/HP)
Standover Height
785 mm (30.9 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power8.1 HP (5.9 kW)) @ 5000 RPM
Torque9.7 Nm (1.0 kgf-m or 7.2 ft.lbs) @ 5000 RPM
Compression10.2:1
Bore x Stroke52.4 x 57.9 mm (2.1 x 2.3 inches)
Valves/Cylinder2
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionTCI
LubricationWet Sump
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchDry centrifugal
Chassis
Frame TypeSteel tube underbone
Rake26.5°
Trail100 mm (3.9 inches)
Front SuspensionTelescopic fork
Rear SuspensionUnit swingarm
Wheelbase1280 mm (50.4 inches)
Ground Clearance145 mm (5.7 inches)
Wheels & Brakes
Front Tyre90/90-12
Rear Tyre110/90-10
Front BrakesSingle disc
Front Brake Ø190 mm (7.5 inches)
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Weight incl.99.0 kg (218.3 pounds)
Seat Height785 mm (30.9 inches) If adjustable, lowest setting.
Overall Height1190 mm (46.9 inches)
Overall Length1880 mm (74.0 inches)
Overall Width750 mm (29.5 inches)
Fuel Capacity5.20 litres (1.37 US gallons)
Other
StarterElectric & kick
Color OptionsPurplish Blue Metallic, Sparkle Green
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.
