im with hillz it up to the rider
imo the 140cc has more top end 125 more bottom end
i've riden an mojo outlaw it revs out at low rpm but has heeps of torque and it's really quick
my 125 vert rides just as good
the 3v 110cc jailin engine just about eats both through tight tracks and is good on jumps (they luv to rev)
later