the cam is the thing that pushes your valves up and down (well, not directly but same principle...). cambelt = the the thing that times your cam with the bottom end (pistons), so that the valves open n close at the right time in relation to the pistons.
hes talking about a diff profile of cam,not too up on the diff cams you can get but basically you can get higher-lift cams (vlaves open further) and longer duration cams which mean valves are open for longer, both of which allowing more in/out.
kickin in is something called coming "on cam"
bad idling means it sometimes sounds lumpy at low revs, again not too sure think its a misfire beacuse of the altered cam profile.
on an energy lump dont do cams for it, chris_h *i think* said theres only about 1-2mm lift on the eccentric lobe part so not much room to work with - that right?