Based on Pro Stock Motorcycle performance data, the NHRA Technical Department is increasing the minimum weight of the 4-valve Suzuki up to 113 CID entries from 625 pounds to 630 pounds. The S&S and VTwin VH160 will be reduced from 640 pounds to 635 pounds. All other minimum weights will remain the same. This rule change will go into effect immediately. NHRA reserves the right in the future to make additional rule changes to control performance and maintain parity in the category.