2021 Um Xtreet RC Technical Analysis & Specification Breakdown
At the heart of the 2021 Um Xtreet RC naked motorcycle, Um utilizes a 123.6 cc (7.5 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 9.5 HP (6.9 kW) at 8,000 rpm while maximum torque reaches 9.5 Nm (7 lb-ft) at 6,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 76.9 HP per liter and a 1,500 rpm working window between peak torque (6,500 rpm) and peak power (8,000 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 Xtreet RC measures 122 kg (269 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.84 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,356 mm (53.4 in) wheelbase engineered for quick, flickable steering geometry. The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Um archive, this model family spans 2 indexed model years from 2018 to 2021, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
76.9 HP/L
Power-to-Weight
0.08 HP/kg (12.84 kg/HP)
Power Band Window
6,500–8,000 rpm
Standover Height
800 mm (31.5 in)
Engine
Displacement123.6 ccm (7.54 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power9.5 HP (6.9 kW)) @ 8000 RPM
Torque9.5 Nm (1.0 kgf-m or 7.0 ft.lbs) @ 6500 RPM
Compression10.0:1
Bore x Stroke58.0 x 47.0 mm (2.3 x 1.9 inches)
Valves/Cylinder4
Fuel SystemInjection. Mikuni
IgnitionCDI
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Chassis
Frame TypeSteel
Front SuspensionHydraulic Telescopic
Front Travel130 mm (5.1 inches)
Rear SuspensionMonoshock with adjustable preload
Wheelbase1356 mm (53.4 inches)
Ground Clearance190 mm (7.5 inches)
Wheels & Brakes
Front Tyre110/80-17
Rear Tyre120/80-17
Front BrakesSingle disc. Hydraulic.
Front Brake Ø250 mm (9.8 inches)
Rear BrakesSingle disc. Hydraulic.
Rear Brake Ø240 mm (9.4 inches)
Dimensions & Weight
Dry Weight122.0 kg (269.0 pounds)
Power/Weight0.0779 HP/kg
Seat Height800 mm (31.5 inches) If adjustable, lowest setting.
Overall Height1050 mm (41.3 inches)
Overall Length2000 mm (78.7 inches)
Overall Width877 mm (34.5 inches)
Fuel Capacity14.00 litres (3.70 US gallons)
Other
StarterElectric & kick
Color OptionsBlack, Blue, Orange, Green, White, Grey
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.
