Engineered by Yamaha for the atv motorcycle segment, the 2018 Yamaha Raptor 90 relies on a 88 cc (5.4 cu in) air-cooled single cylinder, four-stroke powerplant. 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 Raptor 90 measures 119.8 kg (264 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 653 mm (25.7 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,031 mm (40.6 in) wheelbase engineered for quick, flickable steering geometry. The 4.92-liter (1.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 11 indexed model years from 2009 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
653 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
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionDC-CDI
LubricationWet sump
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchWet multiplate
DrivelineCVT, Forward, Neutral, Reverse
Chassis
Front SuspensionSingle A-arm
Front Travel130 mm (5.1 inches)
Rear SuspensionMonoshock swingarm
Rear Travel147 mm (5.8 inches)
Wheelbase1031 mm (40.6 inches)
Ground Clearance99 mm (3.9 inches)
Wheels & Brakes
Front Tyre18/7-8
Rear Tyre18/9-8
Front BrakesExpanding brake (drum brake). Dual
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Weight incl.119.8 kg (264.0 pounds)
Seat Height653 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.
