Both brothers stayed with the company, until Arthur O.Lemon stepped in to design 1921s revolutionary Model K, the first motorcycle to use full pressure lubrication. Dreaming of lighter and faster machines, William left the company to form Ace Motor Corporation, and met his untimely end while taking his Ace Sporting Solo for its first test drive Henderson KJ motorcycle. In 1928, Schwinn hired Arthur Constantine away from Harley Davidson to become his chief engineer, and by 1929, his masterpiece, the Streamline model, aka the KJ appeared.



Among its innovations were a five main bearing crankshaft and down draft manifold. Incredibly smooth and powerful, the KJ quickly became the gold standard of American police departments. As is often the case at Big Dog Garage, theres a funny story behind Jay`s acquisition of this Henderson.



He had bought it in the 1940s and driven it since then. Amazingly, the head had never been taken off and the bottom never opened up, proof of the sheer reliability of the Henderson KJ moto. Jay fell in love with the bike, and decided to preserve it as he found it - an unrestored daily driver from a golden bygone era. More specs and user manual of Henderson Jk you can see in next overview.



Henderson KJ specifications

Engine and transmission
Year: 1929
Engine: 1301cc aircooled in-line 4-cylinder
Transmission: chain
Max speed: 100mph
Horsepower: 40bhp