At the heart of the 2017 Yamaha YFZ50 atv motorcycle, Yamaha relies on a 49.4 cc (3 cu in) air-cooled single cylinder, four-stroke powerplant. Internal engine geometry specifies a bore and stroke of 39.0 x 41.4 mm (1.5 x 1.6 inches) with a 8.5:1 compression ratio.
Rider ergonomics and chassis geometry center around a 585 mm (23 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 830 mm (32.7 in) wheelbase engineered for quick, flickable steering geometry. The 5.8-liter (1.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 6 indexed model years from 2017 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
585 mm (23 in)
Engine
Displacement49.4 ccm (3.01 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression8.5:1
Bore x Stroke39.0 x 41.4 mm (1.5 x 1.6 inches)
Valves/Cylinder2
Fuel SystemCarburettor. TK SVR 22 mm
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionCDI
LubricationWet sump
CoolingAir
Transmission
GearboxAutomatic
Final DriveChain (final drive)
Chassis
Front SuspensionSingle I-arm
Rear SuspensionSwingarm
Wheelbase830 mm (32.7 inches)
Ground Clearance88 mm (3.5 inches)
Wheels & Brakes
Front Tyre16/7-7
Rear Tyre16/7-7
Front BrakesExpanding brake (drum brake)
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Seat Height585 mm (23.0 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.
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.
