The card ignition has i think a chip inside and is part of the ignition when inserted there are i think 3 types of card standard(restricted) dry race and wet race these race cards disable all road going features lights etc.It was Hondas way of stopping hairy Jap kids from derestricting their bikes but there is a splice for this on the TYGA web site.No performance improvement over the MC21 but it is kind of trick!.Single sided swing arm was fashionable in the 90's endurance racer look but heavier than conventional set up.Thats about it.