Engineered by Yamaha for the atv motorcycle segment, the 2017 Yamaha YFM90R pairs a 88 cc (5.4 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 47.0 x 51.0 mm (1.9 x 2.0 inches) with a 10.2:1 compression ratio.
On the scales, the YFM90R measures 120 kg (265 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 654 mm (25.7 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,010 mm (39.8 in) wheelbase engineered for quick, flickable steering geometry. The 4.8-liter (1.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 2 indexed model years from 2017 to 2022, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
654 mm (25.7 in)
Engine
Displacement88.0 ccm (5.37 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression10.2:1
Bore x Stroke47.0 x 51.0 mm (1.9 x 2.0 inches)
Valves/Cylinder2
Fuel SystemCarburettor. TK SVR 22 mm
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionDC-CDI
CoolingAir
Transmission
GearboxAutomatic
Final DriveChain (final drive)
Driveline2WD. F/N/R gears lever.
Chassis
Front SuspensionIndependent double wishbone
Front Travel78 mm (3.1 inches)
Rear SuspensionSwingarm
Rear Travel83 mm (3.3 inches)
Wheelbase1010 mm (39.8 inches)
Ground Clearance100 mm (3.9 inches)
Wheels & Brakes
Front Tyre18/7-8
Rear Tyre18/9-8
Front BrakesExpanding brake (drum brake). Dual sealed drom
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Weight incl.120.0 kg (264.6 pounds)
Seat Height654 mm (25.7 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.
