hi, do vintage mx bikes have power valves like a modern mx bike?
N Nevada Sixx Member Jan 14, 2000 1,033 0 May 3, 2001 #1 hi, do vintage mx bikes have power valves like a modern mx bike?
S Sawblade Timmy Timmy Timmy! Sep 24, 2000 1,491 0 May 6, 2001 #3 Yamaha was the first to have a powervalve on a production bike. 1982 was the year.