I agree with BluGill here. Honda has been basically on top of the performance quad world and they are extremely reliable.. Also if you look, at the recent reviews in the mags, the 400 with its 260cc dis-advantage isn't very far behind the Raptor(I am not trying to start a war here, just using this as an example)..Honda fourwheelers have been the best at most types of racing wether it is 2 strokes or 4 strokes.

To put it best, "If it isn't broken, Dont fix it!"