User Rating: /5 · No user ratings yet✓ Your rating was saved
MotoLibrary Score
34/100Commuter
Power/Weight
0.07 hp/kg
Torque
9 Nm
Engine
125 ccm
Technical Overview
2021 Um DSRX 125 Technical Analysis & Specification Breakdown
Engineered by Um for the enduro - offroad motorcycle segment, the 2021 Um DSRX 125 features a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 9.4 HP (6.8 kW) at 8,500 rpm while maximum torque reaches 8.6 Nm (6.3 lb-ft) at 8,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 75.2 HP per liter and a 500 rpm working window between peak torque (8,000 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 DSRX 125 measures 132 kg (291 lbs) dry, translating to a power-to-weight ratio of 0.07 HP/kg (14.04 kg per horsepower). Rider ergonomics and chassis geometry center around a 860 mm (33.9 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,330 mm (52.4 in) wheelbase engineered for quick, flickable steering geometry. The 6.3-liter (1.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
75.2 HP/L
Power-to-Weight
0.07 HP/kg (14.04 kg/HP)
Power Band Window
8,000–8,500 rpm
Standover Height
860 mm (33.9 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power9.4 HP (6.8 kW)) @ 8500 RPM
Torque8.6 Nm (0.9 kgf-m or 6.3 ft.lbs) @ 8000 RPM
Compression9.2:1
Bore x Stroke56.6 x 49.5 mm (2.2 x 1.9 inches)
Fuel SystemCarburettor. PZ26
IgnitionCDI
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Performance
Emission DetailsEuro IV
Chassis
Front SuspensionHydraulic Telescopic
Front Travel245 mm (9.6 inches)
Rear SuspensionMonoshock with Spring
Rear Travel230 mm (9.1 inches)
Wheelbase1330 mm (52.4 inches)
Ground Clearance240 mm (9.4 inches)
Wheels & Brakes
Front Tyre90/90-19
Rear Tyre110/90-17
Front BrakesSingle disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight132.0 kg (291.0 pounds)
Power/Weight0.0711 HP/kg
Seat Height860 mm (33.9 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.
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.
