one of my relatives purchased a king quad 4x4 last year and the thing has no bottem end what so ever. i mean it'll climb with the best of them, but in low range rpms it boggs, its weird...and down shifting is about as smooth as stalling out a car. it jerks and slows down....is this common in the king quads? it bugs me to drive something that reacts like this...you go the speed limit where i ride(yes theres one where i ride) and the thing bogs, then you cran to like 30-35mph(double the speed limit) and it rides perfectly...the z400 isnt like this is it??