Yamaha MT-03

Yamaha MT-03 is a single-cylinder motorcycle produced by Yamaha Motor Company since 2006. Its engine which provides high-torque and unmistakable sound has been used for several different model such as Yamaha XT660, Aprilia Pegaso Strada 650. It is hard to fit into one category, different sources refers as naked bike, café racer, street racer or torque sport or even motard.

Propulsion
The MT-03 is driven by the same single-cylinder engine as the Enduro Yamaha XT 660 R and the travel Enduro Yamaha XT 660 Z Ténéré . The four-stroke engine of the motor manufacturer Minarelli produces a nominal output of 35.3 kW ( 48 hp) at an engine speed of 6,000 rpm . The maximum torque of 56.2 Nm at 5.250/min . The engine's power was increased by an enlarged Airboxvolumen and a revised map of the injection system at low and medium engine speeds .
Has the ceramic coated aluminum cylinder bore of Ø 100 mm in diameter, forged pistons a stroke of 84 mm and a compression ratio of 10:1. The compact cylinder head has a chain driven , roller bearings , single overhead camshaft (SOHC) , which controls two intake and two exhaust valves via roller rocker forked . The slightly inclined forward four-stroke engine has an electronic fuel injection with transistor ignition. A balancer shaft reduces vibration .
Full tank , the motorcycle without special accessories with about 192 kg a comparatively high for this performance class weight. Top speed is the manufacturer about 160 km/h . The exhaust gases of the engine equipped with an injection system will be rendered by an uncontrolled catalytic converter in combination with a secondary air system. The power is transmitted via a five-speed transmission and - in contrast to the concept car , which still had a belt drive - a chain drive . 

Suspension
The brakes (front dual lens with 298 mm and rear Single disc with 245 mm diameter) comes from the Yamaha FZ6 and is considered a very reliable and effective. The overall gear ratio (gear ratio 2.500 / 1.625 / 1.150 / 0.909 / 0.769 , 2.080 Primary transmission , final drive ratio 3.130) is shorter than that of the XT660 , which allows higher acceleration values ​​. The bike has compact dimensions, with a wheelbase of 1,420 mm and is in conjunction with the short spring travel of 130 mm front and 120 mm rear very handy with a penchant for nervousness. The moderate tire sizes (front 120/70 ZR17 M / C 58H , rear 160/60 ZR17 M / C 69H) allow a neutral steering and cornering behavior. The fork is also identical with the FZ6 , the rear wheel is guided in a cast aluminum swingarm . The rear , hinged on a lever and side-mounted , strut comes from suppliers Sachs. The riding position on the 805 mm high for the driver seat is upright, close to the bar and is comparable to a supermoto . The slight increase in passenger seat is not suitable for longer trips for two. The tachometer is designed as an analog round gauge , speedometer with odometer as a digital liquid crystal display. The fuel tank holds 15 liters , the manufacturer recommends the use of premium gasoline .

 

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