Yamaha YS125 - 2018 Specifications and Reviews

The 2018 Yamaha YS125 is an accessible entry-level commuter designed for novice riders and urban users seeking reliable, fuel-efficient transportation. Its lightweight 129kg frame, compact 795mm seat height, and manageable 125cc engine make it ideal for learners navigating city streets. Known for affordability and low maintenance, this bike excels as a practical first motorcycle for budget-conscious riders.

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General information

CategoryAllround
Year2018
ModelYamaha YS125

Engine and Transmission Specifications

ClutchWet, multiple-disc coil spring
Transmission type,final driveChain
Gearbox5-speed
Cooling systemAir
Lubrication systemWet sump
IgnitionTCI
Fuel controlSingle Overhead Cams (SOHC)
Fuel systemInjection
Valves per cylinder2
Bore x Stroke52.4 x 57.9 mm (2.1 x 2.3 inches)
Compression10.0:1
Torque10.80 Nm (1.1 kgf-m or 8.0 ft.lbs) @ 6000 RPM
Power10.46 HP (7.6 kW) @ 7500 RPM
Engine typeSingle cylinder, four-stroke
Capacity:125.00 ccm (7.63 cubic inches)
 
 

Brakes, suspension, Frame and wheels

SeatDual seat and passenger grab rails
Rear brakes diameter130 mm (5.1 inches)
Rear brakesExpanding brake (drum brake)
Front brakes diameter245 mm (9.6 inches)
Front brakesSingle disc
Rear tyre100/80-18
Front tyre2.75-18
Rear wheel travel105 mm (4.1 inches)
Rear SuspensionSwingarm
Front wheel travel120 mm (4.7 inches)
Front SuspensionTelescopic forks
Trail90 mm (3.5 inches)
Rake (fork angle)26.0°
Frame typeSteel, diamond shaped

Physical measures and capacities

Oil capacity1.20 litres (0.08 quarts)
Fuel capacity14.00 litres (3.70 gallons)
Wheelbase1,320 mm (52.0 inches)
Ground clearance150 mm (5.9 inches)
Overall width735 mm (28.9 inches)
Overall length2,005 mm (78.9 inches)
Overall height1,050 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 optionsWhite, red, 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

2018 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 2018 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 2018 Yamaha YS125 motorcycle is a reliable and affordable option for riders looking for a practical and stylish bike. With a 125cc engine, this motorcycle provides smooth acceleration and excellent fuel efficiency, making it perfect for city commutes or longer rides. The YS125 also features a comfortable seat, responsive brakes, and a sleek design that is sure to turn heads on the road. Whether you're a beginner rider or a seasoned pro, the Yamaha YS125 offers a great balance of performance, comfort, and affordability. Overall, the 2018 Yamaha YS125 motorcycle is a great choice for anyone in the market for a dependable and stylish bike. With its efficient engine, comfortable seating, and attractive design, this motorcycle is a solid option for urban commuters and weekend riders alike. Whether you're navigating city streets or cruising along the open road, the YS125 provides a smooth and enjoyable ride that is sure to impress.
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