Built around Yamaha's super motard motorcycle platform, the 2006 Yamaha XT 660 R Supermotard pairs a 660 cc (40.3 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 47.3 HP (34.5 kW) at 6,000 rpm while maximum torque reaches 58.4 Nm (43.1 lb-ft) at 5,950 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 71.7 HP per liter and a 50 rpm working window between peak torque (5,950 rpm) and peak power (6,000 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the XT 660 R Supermotard measures 173 kg (381 lbs) dry, translating to a power-to-weight ratio of 0.27 HP/kg (3.66 kg per horsepower). Rider ergonomics and chassis geometry center around a 875 mm (34.4 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,490 mm (58.7 in) wheelbase engineered for balanced agility and highway composure. The 15-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
71.7 HP/L
Power-to-Weight
0.27 HP/kg (3.66 kg/HP)
Power Band Window
5,950–6,000 rpm
Standover Height
875 mm (34.4 in)
Engine
Displacement660.0 ccm (40.27 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power47.3 HP (34.5 kW)) @ 6000 RPM
Torque58.4 Nm (6.0 kgf-m or 43.1 ft.lbs) @ 5950 RPM
Compression10.0:1
Bore x Stroke100.0 x 84.0 mm (3.9 x 3.3 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionTCI
LubricationDry sump
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet, multiple disc
Chassis
Front SuspensionTelescopic fork
Front Travel200 mm (7.9 inches)
Rear SuspensionMonocross with linkage
Rear Travel125 mm (4.9 inches)
Wheelbase1490 mm (58.7 inches)
Ground Clearance205 mm (8.1 inches)
Wheels & Brakes
Front Tyre120/70-R17
Rear Tyre160/60-R17
Front BrakesSingle disc
Front Brake Ø320 mm (12.6 inches)
Rear BrakesSingle disc
Rear Brake Ø245 mm (9.6 inches)
Dimensions & Weight
Dry Weight173.0 kg (381.4 pounds)
Power/Weight0.2736 HP/kg
Seat Height875 mm (34.4 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.
