Positioned in Yamaha's allround motorcycle lineup, the 2020 Yamaha SZ pairs a 149.3 cc (9.1 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 12.1 HP (8.8 kW) at 7,500 rpm while maximum torque reaches 12.8 Nm (9.4 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 81 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 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 SZ measures 125 kg (276 lbs) wet (curb), translating to a power-to-weight ratio of 0.1 HP/kg (10.33 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 1,320 mm (52 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 Yamaha archive, this model family spans 3 indexed model years from 2020 to 2022, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
81 HP/L
Power-to-Weight
0.1 HP/kg (10.33 kg/HP)
Power Band Window
6,000–7,500 rpm
Standover Height
800 mm (31.5 in)
Engine
Displacement149.3 ccm (9.11 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsForward-inclined cylinder
Power12.1 HP (8.8 kW)) @ 7500 RPM
Torque12.8 Nm (1.3 kgf-m or 9.4 ft.lbs) @ 6000 RPM
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.
