I went and spent 40 bucks at the dealer yesterday trying to fix this problem. I bought a 40-22 spring and 3 23-54 clutch weights that also fit a 2013 550. It is like a night and day difference on my machine. I have zero hard engagement. It is as smooth as my 570 now in forward and reverse and engages just over idle. I did not touch the secondary. For my machine this was the cats meow it has been waiting for. For you guys who still have this problem and ready for a true fix this one should be it. Like I said it worked wonders for mine.

Ronnie