Pro Stock Motorcycle, formerly known as Pro Stock Bike is a drag racing

Drag racing

Drag racing is a competition in which specially prepared automobiles or motorcycles compete two at a time to be the first to cross a set finish line, from a standing start, in a straight line, over a measured distance, most commonly a ¼-mile straight track....

 class that is the two-wheeled equivalent of Pro Stock

Pro Stock

Pro Stock Drag Racing is a class of drag racing featuring 'Factory Hot-Rods'. The class can be known as "all motor," as the cars cannot use artificial induction such as turbocharging, supercharging, or nitrous oxide, and there are very strict rules governing the modifications allowed to the...

. 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. Their 1st Points Championship Season took place in the 1987 NHRA Season. The class has for years been dominated by inline-4 cylinder Suzuki based bikes but in recent years Harley-Davidson

Harley-Davidson

Harley-Davidson , often abbreviated H-D or Harley, is an American motorcycle manufacturer. Founded in Milwaukee, Wisconsin, during the first decade of the 20th century, it was one of two major American motorcycle manufacturers to survive the Great Depression...

 based V-twin

V-twin

A V-twin engine is a two-cylinder internal combustion engine where the cylinders are arranged in a V configuration.- Crankshaft configuration :Most V-twin engines have a single crankpin, which is shared by both connecting rods...

machines have become more competitive due to favorable rule changes. Frames are purpose-built specifically for drag racing and are not based on their road-going counterparts.