If you want a longer 5th on your atv you'll want one from an 8p gearbox..
CEG is the same as 8P. Personally I don't really like that 5th gear in the g40 box is just cocks up the ratios. Annoying on the motorway, you either have to stay at 90 all the time or you're constantly having to switch down to 4th.
I can't remember exact RPMs, it was in a car I don't own any more but I do remember it annoyed me.