It's the same thing that leads to all those warnings to Harley riders about not lugging their roller bearing engines; roller and ball bearings with flat spots don't roll very well, and they don't last very long when they slide rather than roll.
JMHO - Jerry
My dad, the Senior Master Chief Machinist Mate and Journeyman Tool & Die Maker always taught me that lugging a motor is the worst thing you can do, and the second worst is revving up a motor with no load.
The GM at my dealer overseeing my build says the lifters in the '09 SERG are fine and we don't need to replace them even with my open checkbook approach.
When I asked about the SE lifters, my Tech reminded me that they were made by Jim's and told me that they had issues with them.
And my dealer is going to warranty the bike at least for the next 5 years.
They know that once I warm up my bikes up that "It's On"
There is a school of thought that the synthetic oils are sometimes too slippery and allow the the rollers to slide instead of roll, thereby causing flat spots and failure.
I am going back to Dino oil, at least for a while.
I would really appreciate if the Builders and Techs would weigh in on this one.