User Rating: /5 · No user ratings yet✓ Your rating was saved
MotoLibrary Score
37/100Commuter
Power/Weight
0.12 hp/kg
Top Speed
90 km/h
Engine
140 ccm
Technical Overview
2023 Thumpstar TSR 140 SW Technical Analysis & Specification Breakdown
Engineered by Thumpstar for the minibike, cross motorcycle segment, the 2023 Thumpstar TSR 140 SW utilizes a 140 cc (8.5 cu in) single cylinder, four-stroke layout. In factory specification, peak output is rated at 11 HP (8 kW), transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 78.6 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 TSR 140 SW measures 90 kg (198 lbs) wet (curb), translating to a power-to-weight ratio of 0.12 HP/kg (8.18 kg per horsepower). Rider ergonomics and chassis geometry center around a 830 mm (32.7 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,260 mm (49.6 in) wheelbase engineered for quick, flickable steering geometry. The 3.4-liter (0.9 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 90 km/h (56 mph).
Specific Output
78.6 HP/L
Power-to-Weight
0.12 HP/kg (8.18 kg/HP)
Standover Height
830 mm (32.7 in)
Engine
Displacement140.0 ccm (8.54 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power11.0 HP (8.0 kW))
Fuel SystemCarburettor. Mikuni VM22 26mm
Transmission
Gearbox4-speed
Final DriveChain (final drive)
Performance
Top Speed90.0 km/h (55.9 mph)
ExhaustPipebomb DW1
Chassis
Front SuspensionVS1 Inverted Forks
Rear SuspensionVS 1 Linkage U Shock
Wheelbase1260 mm (49.6 inches)
Wheels & Brakes
Front Tyre70/100-17
Rear Tyre80/100-14
Front BrakesSingle disc. Dual piston hydraulic disc
Front Brake Ø220 mm (8.7 inches)
Rear BrakesSingle disc. HSK Single Piston
Rear Brake Ø190 mm (7.5 inches)
WheelsAlloy rims
Dimensions & Weight
Weight incl.90.0 kg (198.4 pounds)
Seat Height830 mm (32.7 inches) If adjustable, lowest setting.
Fuel Capacity3.40 litres (0.90 US gallons)
Other
StarterKick
Color OptionsBlack with various color kits for sale.
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.
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.
