grease

Hey guys, I am rebuilding my primary.It may sounds stupid, but would you put grease on the crankshaft or leave it dry when rebuilding the alternator on it. I had the conversation with my stepbrother who’s a mechanic. Regards

For the last two years since I restored my 1968 Commando I've noticed lines of grease sprayed on the left side of the front wheel hub. How serious is this? I don't want the front wheel to seize while I'm riding. How long does it take to replace the bearings and what is the cost of a sealed set...