Pro Stock Motorcycle Pro Stock Motorcycle Pro Stock Motorcycle, formerly known as Pro Stock Bike, is a motorcycle drag racing class that is the two-wheeled equivalent of Pro Stock. It has been a feature of NHRA drag racing since the 1980s when it was added to the professional class structure and has since spread around the globe. The first points championship season was the 1987 NHRA season. The class has for years been dominated by inline-4 cylinder Suzuki based bikes but in recent years Harley-Davidson based V-twin machines have become more competitive due to favorable rule changes (160 c.i. Harleys vs. 107 c.i
Osborn Engineering Company Osborn Engineering Company Osborn Engineering Company was a British manufacturer of motorcycles, which sold its machines under the OEC brand name. The company was founded by John Osborn in 1901, producing Minerva engined bikes. Later machines used a variety of engines from companies such as Blackburne, and JAP. In 1927 OEC introduced its first bike with the duplex steering system. The most famous model produced by the firm was the OEC Commander introduced in 1938, with a 500 cc single-cylinder Matchless engine and duplex steering. During the Second World War, OEC ceased motorcycle production to concentrate on war work. In