Originally Posted by SalvadoriRacing
a pinched piston/sleeve set is not like a brand new............it can be sooooooooo tight, just depends how it's done........
and when you manage to turn the engine it looses its pinch within few tanks...........
don't worry, a new engine won't be that hard to start........
I can attest to these statements. My NSR12S5 sleeve gave out during a race once. Had it pinched, and within 3 races, it was back to where it was originally. So I ordered a new set.
If you break it in correctly, it shouldn't have a problem running it, but it will take some time to get that first tank thru. The P/S set for the NSR was so tight it would not turn over with my box. It was so bad the starter box belt actually stripped. After replacing the belt and getting a heat gun, I got it to turn. My RB was even worse. For the first 8 tanks, I still needed a screwdriver to unstick the flywheel.