I'm rebuilding a 1982 YZ 100 from the bottom up...it was a "bike-in-a-bucket" thing. All parts are accounted for though. So I'm at the place where the crank seals go in. This should be one of the easier steps in the whole process. I got OEM seals for the bike. What I'm finding is that as I crank down the torque on the nut to the main gear on the shaft, it (obviously) mates quite tightly with the seal...so much so, that the crank turns with some difficulty. AND I haven't even torqued it to spec yet. Is this normal, and will the seal sort of "break-in over time"? Here's a pic, and yes, I did drive that seal in a little further than what you see in the pic.