I'm not going to disagree that the 650 electronics will be better for multiple reasons. I am going to play devils advocate though since no one said anything about the positives to running 750 electronics. The main benefit to run 750 over 650 is that the 750 cases will have to be machined to accept the 650 stator. Also, though I've never had a 750 stator fail on me, at least they are easier to replace than the 650 stator. You don't have to remove the flywheel to inspect/replace them. Also the 750 electric parts are newer, therefore you can get cleaner parts. Not that you can't get clean 650 electrics because you can and they are cheaper.