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NSU 251 TS

Make Model	NSU 251 TS
Year	1926 - 29
Engine	Single cylinder, 4 stroke, overhead valve
Capacity	247 cc / 15.1 cub in
Cooling	Air cooled
Ignition	Magneto
Max Power	11.8 kW / 16 hp @ 4400 rpm
Transmission	3 Speed
Final Drive	Chain
Font Suspension	Spring loaded fork
Frame	Steel, integrated open frame with engine as integral component
Top Speed	100 km/h / 62 mph

In 1926, private driver Franz Islinger from Mannheim won the German motorcycle championship in the 250 cc class with the NSU 251 S. Modifications to the standard 250 cc engine on the connecting rods, pistons and cylinder converted the side-valve touring engine into an overhead-valve sports engine producing more than 60% greater power. Other advantages were lower weight of the oscillating control organs. That was especially important for high-revving engines.

Below is the racing version: