Clement-c.1902 Model B 143cc
Displacing 143cc the Clément engine powering this gents' bicycle is a single-cylinder four-stroke with detachable cylinder head and overhead valves, the inlet being of the 'atmospheric' type and the exhaust mechanically operated. The motor features coil ignition, and drives the rear wheel via a long belt tensioned by a jockey wheel attached to the seat tube. Fuel is contained in a cylindrical tank mounted above the bicycle's rear mudguard, behind the saddle.
Courtesy Classic Motorcycles Austria