Built around Yamaha's atv motorcycle platform, the 2009 Yamaha YFM50 pairs a 49 cc (3 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 39.0 x 41.4 mm (1.5 x 1.6 inches) with a 10.3:1 compression ratio.
On the scales, the YFM50 measures 108 kg (238 lbs) dry. Rider ergonomics and chassis geometry center around a 618 mm (24.3 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,030 mm (40.6 in) wheelbase engineered for quick, flickable steering geometry. The 6.8-liter (1.8 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Standover Height
618 mm (24.3 in)
Engine
Displacement49.0 ccm (2.99 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression10.3:1
Bore x Stroke39.0 x 41.4 mm (1.5 x 1.6 inches)
Fuel SystemCarburettor. Mikuni VM 16 SH
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionDC-CDI
LubricationWet sump
CoolingAir
Transmission
GearboxAutomatic
Final DriveShaft drive (cardan) (final drive)
Chassis
Wheelbase1030 mm (40.6 inches)
Wheels & Brakes
Front Tyre16/7-10
Rear Tyre16/10-9
Front BrakesExpanding brake (drum brake)
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight108.0 kg (238.1 pounds)
Seat Height618 mm (24.3 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.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
