Positioned in Yamaha's sport motorcycle lineup, the 2018 Yamaha YZF-R15s features a 149.8 cc (9.1 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 16.6 HP (12.1 kW) at 8,500 rpm while maximum torque reaches 15 Nm (11.1 lb-ft) at 7,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 110.8 HP per liter and a 1,000 rpm working window between peak torque (7,500 rpm) and peak power (8,500 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the YZF-R15s measures 136 kg (300 lbs) wet (curb), translating to a power-to-weight ratio of 0.12 HP/kg (8.19 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 1,345 mm (53 in) wheelbase engineered for quick, flickable steering geometry. The 12-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
110.8 HP/L
Power-to-Weight
0.12 HP/kg (8.19 kg/HP)
Power Band Window
7,500–8,500 rpm
Standover Height
800 mm (31.5 in)
Engine
Displacement149.8 ccm (9.14 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power16.6 HP (12.1 kW)) @ 8500 RPM
Torque15.0 Nm (1.5 kgf-m or 11.1 ft.lbs) @ 7500 RPM
Compression10.4:1
Bore x Stroke57.0 x 58.7 mm (2.2 x 2.3 inches)
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionT.C.I
LubricationWet sump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet Multiple-disc
Chassis
Frame TypeDelta box
Rake26.0°
Trail98 mm (3.9 inches)
Front SuspensionTelescopic Hydraulic
Front Travel130 mm (5.1 inches)
Rear SuspensionSwingarm. Linked Type Monocross Suspension.
Rear Travel103 mm (4.1 inches)
Wheelbase1345 mm (53.0 inches)
Ground Clearance160 mm (6.3 inches)
Wheels & Brakes
Front Tyre90/80-17
Rear Tyre130/70-17
Front BrakesSingle disc
Front Brake Ø267 mm (10.5 inches)
Rear BrakesSingle disc
Rear Brake Ø130 mm (5.1 inches)
Dimensions & Weight
Weight incl.136.0 kg (299.8 pounds)
Seat Height800 mm (31.5 inches) If adjustable, lowest setting.
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.
