The adjustment is part of NHRA’s ongoing efforts at maintaining competition and parity within the category. The change becomes effective April 27, 2012, at the O’Reilly Auto Parts NHRA Spring Nationals presented by Super Start Batteries in Houston, which is the next stop in the NHRA Full Throttle Drag Racing Series for Pro Stock Motorcycles. The minimum weight for NHRA-accepted American pushrod V-Twin 160-cid will remain at 615 pounds, and the Suzuki 107-cid two-valve will remain at 595 pounds.
NHRA will continue to monitor performance and will make adjustments as necessary.