We do not run NEAR the RPM they are. I have heard from some guys in the know that they are now approaching 11000 rpm and a couple are over that. BUt I have no first hand knowledge. Ours we shift at 9400 go through the traps at 9700 or so.

As for maintenance it has not been to bad. Vaveltrain stability is a big deal with them and once that gets worked out it has been reasonable. We managed to get 12 passes out of the last set of intake springs. The exhausts are still hanging in there at 16.

"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"