2008Yamaha XT660X

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The 2008 Yamaha XT660X is a lightweight supermoto designed for versatile riders seeking an agile, manageable machine. Its 660cc single-cylinder engine delivers accessible power and torque, making it ideal for urban commuting and weekend road adventures. Known for its nimble handling and approachable performance, the XT660X appeals to both novice and experienced riders.

Capacity: 660.0 ccm
Engine: Single, four-stroke
Gearbox: 5-speed
Dry weight: 177.0 kg
Seat height: 875 mm
Power: 47.3 HP (34.8 kW)

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What’s new for the 2008 Yamaha XT660X

vs the 2007

Spec	2007	2008
Torque	60.0 Nm (6.1 kgf-m or 44.3 ft.lbs)	60.0 Nm (6.1 kgf-m or 44.3 ft.lbs) @ 6100 RPM

Other years 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail40%

Cornering85%

City riding70%

Daily riding60%

Touring40%

Two-up35%

Track60%

Best for: Built as a road-focused supermoto, this bike is meant for flicking through tight city streets and attacking twisty backroads rather than long-distance cruising or serious off-road work.
Built for: It suits a playful, corner-hungry rider who values sharp steering, sporty street handling, and a punchy single-cylinder engine over outright top speed or plush comfort.
Not ideal for: It is not a good match for riders seeking a relaxed touring companion, heavy passenger carrying capability, or a highly capable off-road adventure machine.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 875mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with tip-toe one foot on the 2008 Yamaha XT660X, with a relaxed knee angle of around 140 degrees and a forward-leaning riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 821-900 mm — Long Legs →

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Full specifications

Engine

Capacity: 660.0 ccm
Power: 47.3 HP (34.8 kW)
Torque: 60.0 Nm (6.1 kgf-m) @ 6100 RPM
Engine type: Single, four-stroke
Power/weight ratio: 0.2672 HP/kg (dry)
Bore x stroke: 100.0 x 84.0 mm
Compression: 10.0:1
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Ignition: TCI
Valves per cylinder: 4
Lubrication system: Dry sump

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet, multiple-disc coil spring

Dimensions & weight

Wheelbase: 1490 mm
Overall length: 2175 mm
Overall width: 860 mm
Overall height: 1170 mm
Seat height: 875 mm
Dry weight: 177.0 kg
Wet weight: 189.0 kg
Fuel capacity: 15.00 litres
Ground clearance: 205 mm
Oil capacity: 2.90 litres

Chassis & suspension

Frame: Steel tube, diamond shaped
Front suspension: Telescopic forks
Rear suspension: Swingarm (monocross)
Front wheel travel: 130 mm
Rear wheel travel: 120 mm
Rake (fork angle): 26.0°
Trail: 94 mm

Brakes & wheels

Front brakes: Single disc
Front brakes diameter: 320 mm
Rear brakes: Single disc
Rear brakes diameter: 245 mm
Front tyre: 120/70-R17
Rear tyre: 160/60-R17

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	2006	2008	2011	2013	2015
Capacity	660 cc	660 cc	660 cc	660 cc	660 cc
Dry weight	165 kg	177 kg	177 kg	177 kg	177 kg
Seat height	865 mm	875 mm	865 mm	865 mm	865 mm
Fuel capacity	15 L	15 L	15 L	15 L	15 L