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
BSA Model E BSA Model E The BSA Model E was a British V-twin motorcycle manufactured by Birmingham Small Arms Company (BSA) at their factory in Armoury Road, Small Heath, Birmingham from 1919. It was often used with the matching BSA sidecar. After having been turned over to weapons production for World War I, BSA returned to producing motorcycles again which were sold as affordable with reasonable performance for the average user. BSA stressed the reliability of their machines, the availability of spares and dealer support. The BSA Model E was the first of a series of successful V-twins based around the reliable