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Motorcycle drag racing (also known as "sprints") involves two participants lining up at a dragstrip with a signaled starting line. Upon the starting signal, the riders accelerate down a 1 ⁄ 4 mile (0.40 km) or 1 ⁄ 8 mile (0.20 km) long, two lane, straight paved track where their elapsed time and terminal speed are recorded.
Bracket racing is a form of drag racing that allows for a handicap between predicted elapsed time of the two cars over a standard distance, typically within the three standard distances (1/8 mile, 1,000 foot, or 1/4 mile) of drag racing.
Some drag strips are even shorter and run 660 feet, 201 m, or 1/8 mile. The 1,000 foot distance is now also popular with bracket racing, especially in meets where there are 1/8 mile cars and 1/4 mile cars racing together, and is used by the revived American Drag Racing League for its primary classes (not Jr Dragster).
This division has specific rules about engines, components, bodies, etc. Pro Modifieds can either be raced on 1/4 mile or 1/8 mile tracks. Usually, the NHRA races Pro Mod cars on the 1/4 mile, resulting in high 5 to low 6 second passes, while the PDRA races strictly on 1/8 mile track setups, allowing for high 3 second-to low 4 second passes.
Construction began in March 1998 on Irwindale's 6,500-seat grandstand and 1 ⁄ 2 - and 1 ⁄ 3-mile ovals. Irwindale Speedway hoped to fill the void left in the Los Angeles Basin left by the closures of the famed Riverside International Raceway, Ontario Motor Speedway and Saugus Speedway. The $7-million project was completed March 1999 and ...
Although a quarter mile (1320 feet, 402 m) is the best known measure for a drag track, many tracks are eighth mile (201 m) tracks, and the premiere classes will run 1,000 foot (304.8 m) races. The race is begun from a standing start which allows three factors to affect the outcome of the race: reaction time, power/weight ratio, and traction.
As with land-based drag racing, competitors race their vehicles for the lowest elapsed time (low ET) over a straight race course of a defined length. There are three standard drag race course lengths, 660 feet (1/8 mile), 1,320 foot (1/4 mile), and the most common length, used in professional drag boat racing, 1,000 feet (3/16 mile plus 10 feet).
Sportbike motorcycle drag racing involves racing motorcycles, often imported from Japan. Many sportbikes such as the Suzuki Hayabusa , the Kawasaki ZX-14, or the BMW S1000RR can perform a 1/4-mile drag race in the 9-second range with little to no modifications. 1/8th-mile racing is also popular in some parts of the country.