Engineered by Yamaha for the enduro - offroad motorcycle segment, the 2006 Yamaha TT-R90 pairs a 89 cc (5.4 cu in) liquid-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 a 5-speed gearbox and 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-R90 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, combined with a 1,040 mm (40.9 in) wheelbase engineered for quick, flickable steering geometry. The 8-liter (2.1 US gal) fuel tank supports practical everyday commuting and weekend road stints.
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 TMX38
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionCDI
LubricationPremix
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet, multiple-disc
Chassis
Front SuspensionTelescopic fork
Front Travel110 mm (4.3 inches)
Rear SuspensionSwinging arm (monocross)
Rear Travel125 mm (4.9 inches)
Wheelbase1040 mm (40.9 inches)
Ground Clearance172 mm (6.8 inches)
Wheels & Brakes
Front Tyre70/90-M17
Rear Tyre90/90-M14
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
