Yamaha YS125 - 2020 Specifications and Reviews

The 2020 Yamaha YS125 is a lightweight two-stroke allrounder designed for riders seeking an affordable, nimble machine. Powered by a 125cc reed-valve engine producing 10.5 horsepower, it excels in urban commuting and recreational riding. Its liquid-cooled construction and simple carburetor setup deliver reliable performance with minimal maintenance demands.

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General information

CategoryAllround
Year2020
ModelYamaha YS125

Engine and Transmission Specifications

ClutchO-ring chain
Transmission typeChain   (final drive)
Gearbox6-speed
Cooling systemLiquid
Lubrication systemWet Sump
IgnitionCDI
Fuel controlSingle Overhead Cams (SOHC)
Fuel systemCarburettor
Bore x Stroke54.4 x 57.9 mm (2.1 x 2.3 inches)
Compression10.0:1
Torque10.8 Nm (1.1 kgf-m or 8.0 ft.lbs) @ 6000 RPM
Power10.5 HP (7.6 kW) @ 7500 RPM
Engine detailsReed-valve-inducted
Engine typeSingle cylinder, two-stroke
Capacity:125.0 ccm (7.63 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesExpanding brake (drum brake). Hydraulic.
Diameter245 mm (9.6 inches)
Front brakesSingle disc. Hydraulic.
Rear tire100/80-18
Front tire2.75-18
Rear wheel travel112 mm (4.4 inches)
Rear SuspensionSwing arm
Front wheel travel120 mm (4.7 inches)
Front SuspensionTelescopic fork
Trail117 mm (4.6 inches)
Rake (fork angle)26.8°
 
 

Physical measures and capacities

Fuel capacity14.00 litres (3.70 US gallons)
Wheelbase1320 mm (52.0 inches)
Ground clearance150 mm (5.9 inches)
Overall width735 mm (28.9 inches)
Overall length2005 mm (78.9 inches)
Overall height1050 mm (41.3 inches)
Seat height795 mm (31.3 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc129.0 kg (284.4 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
StarterElectric
Color optionsRed/Black

Performance Profile & Rider Fit

10.5 hp
Peak Power

Best For

Track10%
City88%
Cornering55%
Daily Riding82%
Touring30%
Passenger25%

Rider Profile

Best ForIdeal for beginners or learner-permit riders who want a light, unintimidating bike to build confidence on.
PurposeBuilt primarily for commuting and city riding rather than performance or long-distance travel.
Rider FitIts low seat height and light 129 kg weight make it very manageable for shorter or less experienced riders.
CharacterA friendly, economical, and easy-going small-capacity bike that prioritizes practicality over excitement.
Not Ideal ForNot suited for highway touring, carrying a passenger comfortably, or riders seeking strong acceleration.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2020 Yamaha YS125 Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 795mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2020 Yamaha YS125, with a moderate knee angle of around 115 degrees and a forward-leaning riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2020 Yamaha YS125 is a reliable and efficient motorcycle that is perfect for daily commuting. With its 125cc engine, this bike offers excellent fuel efficiency, making it an ideal choice for those who want to save on their daily transportation costs. The YS125 also features a sleek and modern design, along with a comfortable riding position, making it a great option for riders of all levels of experience. In addition to its practicality, the 2020 Yamaha YS125 also delivers a smooth and enjoyable ride. Its lightweight frame and agile handling make it easy to maneuver through city streets, while its responsive braking system provides added safety and confidence on the road. Overall, the YS125 is a solid choice for anyone in need of a dependable and economical motorcycle for their daily travels.
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