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
American IronHorse Hendricson, who ran the company during its second bankruptcy continued to address major problems after the final purchase by Textron Inc in bankruptcy court. Textron liquidated the company in 2008 according to inside sources due to a lack of operating capital, low demand for its motorcycles, and lack of a solid business plan to correct falling custom motorcycle demand in 2008. Several of the company directors continued operating failing dealerships in the custom motorcycle market in Tarrant County Texas. Roadster American IronHorse American IronHorse was an American motorcycle manufacturer that was founded in 1995 by Tim Edmundson and Bill Rucker.