The Yamaha XT660 is dual-purpose on/off road motorcycles released by Yamaha Motors as a replacement for the XT600.
It is a development of the original XT series ('X' stands for CROSS, 'T' for TRAIL), a line of motorcycles inspired by those used on the Paris Dakar rally. The first XT was released in 1976.
A five-valve version of the 660 cc engine was used in a number of MZ (MuZ) motorcycles, including the MZ Skorpion, Baghira and Mastiff.
Engine Type- Liquid-cooled, 4-stroke, SOHC 4-valve, single
Displacement- 660 cc
Bore x Stroke- 100.0 x 84.0 mm
Compression Ratio- 10.0 : 1
Lubrication System- Dry sump
Fuel Management- Electronic fuel injection
Ignition- TCI
Starter System- Electric
Fuel Tank Capacity- 15 L
Final Transmission- Chain drive
Transmission- 5-speed
Length- 2240 mm
Width- 845 mm
Height- 1230 mm
Seat Height- 865 mm
Wheelbase- 1505 mm
Ground Clearance- 210 mm
Wet Weight- 181 kg with 15 litres of fuel
Suspension Front- Telescopic fork
Suspension Rear- Monocross
Brakes Front- Single disc
Brakes Rear- Single disc
Tire Front- 90/90-21 M/C
Tire Rear- 130/80-17 M/C
Tire Front- 120/70R 17M/C
Tire Rear- 160/60R 17M/C
Two other versions of this motorcycle are being produced alongside the XT660R – the XT660X, a more street-oriented supermoto version, and the XT660Z Ténéré, an adventure touring version,. All versions utilise the same engine and share some chassis components.
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