2005 Yamaha TT-R 90 E Technical Analysis & Specification Breakdown
Engineered by Yamaha for the enduro - offroad motorcycle segment, the 2005 Yamaha TT-R 90 E utilizes a 89 cc (5.4 cu in) air-cooled single cylinder, four-stroke layout. Internal engine geometry specifies a bore and stroke of 47.0 x 51.8 mm (1.9 x 2.0 inches) with a 8.5:1 compression ratio.
Rider ergonomics and chassis geometry center around a 625 mm (24.6 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,039 mm (40.9 in) wheelbase engineered for quick, flickable steering geometry. The 4.16-liter (1.1 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 3 indexed model years from 2005 to 2007, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
625 mm (24.6 in)
Engine
Displacement89.0 ccm (5.43 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression8.5:1
Bore x Stroke47.0 x 51.8 mm (1.9 x 2.0 inches)
Fuel SystemCarburettor
Fuel ControlSingle Overhead Cams (SOHC)
CoolingAir
Transmission
Gearbox3-speed
Final DriveChain (final drive)
Chassis
Front SuspensionTelescopic fork
Front Travel109 mm (4.3 inches)
Rear SuspensionSingle shock
Rear Travel94 mm (3.7 inches)
Wheelbase1039 mm (40.9 inches)
Ground Clearance160 mm (6.3 inches)
Wheels & Brakes
Front Tyre70/100-19
Rear Tyre90/100-14
Front BrakesExpanding brake (drum brake)
Front Brake Ø95 mm (3.7 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø110 mm (4.3 inches)
Dimensions & Weight
Seat Height625 mm (24.6 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.
