Make sure to lube and rotate the internal parts a couple times to make sure nothing is binding. Pay special attention to the bottom of the connecting rod where it fits on the crank. The upgrade is a bit thicker and it may rub on the case when you install it. If necessary, you can smooth then end off just a little to make it turn smoother.

Rolland gave this advice in post #42 of the link above, so all credit goes to him if you find this bit of info useful.