Built around Yamaha's enduro - offroad motorcycle platform, the 2007 Yamaha TT-R 90 pairs a 89 cc (5.4 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 5.5 HP (4 kW) at 7,000 rpm while maximum torque reaches 6.1 Nm (4.5 lb-ft), transferring power to the rear wheel through chain final drive. With a specific output of 61.8 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the TT-R 90 measures 60 kg (132 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (10.91 kg per horsepower). 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. The 4.2-liter (1.1 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 2002 to 2007, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
61.8 HP/L
Power-to-Weight
0.09 HP/kg (10.91 kg/HP)
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
Power5.5 HP (4.0 kW)) @ 7000 RPM
Torque6.1 Nm (0.6 kgf-m or 4.5 ft.lbs)
Compression8.5:1
Bore x Stroke47.0 x 51.8 mm (1.9 x 2.0 inches)
Fuel SystemCarburettor. Mikuni VM16/1
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionCDI
LubricationWet sump
CoolingAir
Transmission
Final DriveChain (final drive)
ClutchWet, multiple-disc and centrifugal automatic
Chassis
Frame TypeSteel tube backbone
Front SuspensionTelescopic forks
Front Travel110 mm (4.3 inches)
Rear SuspensionSwingingarm (monocross)
Rear Travel95 mm (3.7 inches)
Wheels & Brakes
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
Dry Weight60.0 kg (132.3 pounds)
Power/Weight0.0915 HP/kg
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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
