Mike and Larry,
Ball bearings are in vogue and allowed for all classes. Everyone is running them now days you know. Fetzer valves are optional and may or may not offer a performance advantage.
I hear some people run them and if they win I would pony up the money to put them on my kart! Who was it that you saw mounting them Larry? I bet you Jim runs a Fetzer valve on his kart. He was fast at the last CSC race.