Just to clear things up a bit. No this won't be a race sled. Just some typical trail riding up north and some field riding down here. I've been on a 2013 xf 800 lxr for two seasons and came from a 600. Big difference. I'm looking at a 16 zr 7000 - 137. Three main reason for contemplating the change 1) better fuel economy 2) no in-season oil fill ups 3) cleaner exhaust, the wife doesn't like the 2 stroke stink when she's following. So it sounds like I will notice the top end but maybe not the bottom half. Correct me if I'm wrong, is the e-tec 4 the same as the yama genesis 1050cc? And yama has a 4 cylinder genesis 998cc also? Thanks for all the input!