Someone brought one out to our track once and ran with the Tag class. He used the motor and batteries from the Zero Cycle. The top speed was about equal, maybe a little faster, but where he excelled was in acceleration (of course). Normally on our back straight you might be able to pass one other kart, he was able to take 3 of us in the first half of the straightaway. The one problem that he has running with us was heat production. The batteries produced so much heat when charging between heats. He had bags of ice on the batteries and motor in between runs to cool them down. He actually missed one heat since the batteries weren’t charged and were still hot.