Based on Pro Stock Motorcycle performance data, the NHRA Technical Department is increasing the minimum weight of the Suzuki 4 valve up to 107 CID entries from 610 pounds to 620 pounds, and on 4 valve up to 113 CID entries from 620 pounds to 630 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.
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