Based on Pro Stock Motorcycle performance data, the NHRA Technical Department is reducing the minimum weight of the 4-valve Suzuki up to 113 CID entries from 630 pounds to 625 pounds. The S&S and VTwin VH160 will be increased from 630 pounds to 640 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.