Husqvarna Motorcycles In 1903, they made the jump to motorcycle manufacturing. The first "Husky" motorcycles used imported engines, and it was not until 1918 that Husqvarna began producing machines built entirely in-house. Around that time they secured a contract with the Swedish Army and began entering cross-country and long-distance motorcycle races. In 1920, Husqvarna established its own engine factory and the first engine to be designed was a 550 cc four-stroke 50-degree side-valve V-twin engine, similar to those made by companies like Harley-Davidson and Indian. Husqvarna competed in Grand Prix road racing in the 350cc and 500cc classes during the 1930s and
Motorcycle racing 1200 cc for twins, and between 750 cc and 1000 cc for four cylinder machines. The motorcycles must maintain the same profile as their roadgoing counterparts. The overall appearance, seen from the front, rear and sides, must correspond to that of the bike homologated for use on public roads even though the mechanical elements of the machine have been modified. Supersport racing is another category of motorcycle road racing that employs modified production motorcycles. To be eligible for Supersport racing, a motorcycle must have a four-stroke engine of between 400 and 600 cc for four-cylinder machines, and between 600 and