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
Motorcycle wheel rear wheel which was shown at the Intermot motorcycle show at Cologne in late 1966. Elliott Morris began producing seven-spoke cast magnesium racing wheels in 1973. In November 1974 the Van Veen was exhibited at the Cologne motorcycle show with front and rear cast wheels and triple Brembo disc brakes for their 1975 Model Year rotary-engined OCR1000 machines. Aftermarket cast wheels for Japanese makes having drum rear and front disc brakes were available in UK from late 1974. A patent for a cast alloy motorcycle wheel was filed in 1974 and assigned to Carroll Shelby's Shelby-Dowd Industries; and in early