From Honda Wiki
The Honda CB250 Nighthawk features a 234cc air-cooled parallel twin engine. First manufactured in 1982, the motorcycle has changed little except for color availability.
The CB250 engine generates 15 kW(20 hp) and 19.6 Newton meter(14.5 ft-lb) of Torque, achieves a top speed of around 130 km/h (80 mph), and employs drum brakes and spoked wheels at front and rear (though front disk brakes and alloy wheels are provided in Australia, U.K. and Japan).
The Nighthawk CB250 is essentially a light, maneuverable, inexpensive, economical, and easy to maintain bike. With a dry weight of 130 kg, the bike can achieve 3.4-4.0 L/100km (60 to 70 mpg).
The Honda Nighthawk often is used at Motorcycle Safety Foundation (MSF) training courses held at community colleges across the U.S.A. Its smaller size and lower seat make it popular for riders of smaller stature.
In contrast to the Honda Rebel 250, which offers very similar specification to the CB250, the Nighthawk is considered to be an urban street-use bike, standard street motorcycle, or "Naked bike." The bike's lineage can be traced back to the Honda CM200 Twinstar of the early 1980's, bored out to its maximum capacity of 234cc.